| Value | Category | Cases | |
|---|---|---|---|
| 1968 | 81 | 
                                                                 
                                    
                                    1.2%
                                 
                                                             | 
                                                        
                    |
| 1969 | 138 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    |
| 1970 | 167 | 
                                                                 
                                    
                                    2.4%
                                 
                                                             | 
                                                        
                    |
| 1971 | 141 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    |
| 1972 | 153 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 1973 | 131 | 
                                                                 
                                    
                                    1.9%
                                 
                                                             | 
                                                        
                    |
| 1974 | 141 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    |
| 1975 | 164 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 1976 | 153 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 1977 | 164 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 1978 | 155 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    |
| 1979 | 158 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 1980 | 200 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 1981 | 207 | 
                                                                 
                                    
                                    3%
                                 
                                                             | 
                                                        
                    |
| 1982 | 205 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 1983 | 228 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    |
| 1984 | 245 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 1985 | 241 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    |
| 1986 | 256 | 
                                                                 
                                    
                                    3.7%
                                 
                                                             | 
                                                        
                    |
| 1987 | 205 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 1988 | 215 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 1989 | 206 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 1990 | 214 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 1991 | 221 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    |
| 1992 | 253 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    |
| 1993 | 225 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    |
| 1994 | 194 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 1995 | 201 | 
                                                                 
                                    
                                    2.9%
                                 
                                                             | 
                                                        
                    |
| 1996 | 190 | 
                                                                 
                                    
                                    2.7%
                                 
                                                             | 
                                                        
                    |
| 1997 | 240 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             | 
                                                        
                    |
| 1998 | 231 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    |
| 1999 | 243 | 
                                                                 
                                    
                                    3.5%
                                 
                                                             | 
                                                        
                    |
| 2000 | 226 | 
                                                                 
                                    
                                    3.2%
                                 
                                                             | 
                                                        
                    |
| 2001 | 229 | 
                                                                 
                                    
                                    3.3%
                                 
                                                             | 
                                                        
                    |
| 2002 | 280 | 
                                                                 
                                    
                                    4%
                                 
                                                             | 
                                                        
                    |
| 2003 | 96 | 
                                                                 
                                    
                                    1.4%
                                 
                                                             | 
                                                        
                    |
| 9998 | Dk | 3 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9999 | No response | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1533 |