| Value | Category | Cases | |
|---|---|---|---|
| 1969 | 60 |
1%
|
|
| 1970 | 116 |
2%
|
|
| 1971 | 110 |
1.9%
|
|
| 1972 | 127 |
2.2%
|
|
| 1973 | 122 |
2.1%
|
|
| 1974 | 138 |
2.4%
|
|
| 1975 | 151 |
2.6%
|
|
| 1976 | 138 |
2.4%
|
|
| 1977 | 142 |
2.5%
|
|
| 1978 | 157 |
2.7%
|
|
| 1979 | 181 |
3.1%
|
|
| 1980 | 169 |
2.9%
|
|
| 1981 | 203 |
3.5%
|
|
| 1982 | 203 |
3.5%
|
|
| 1983 | 236 |
4.1%
|
|
| 1984 | 246 |
4.3%
|
|
| 1985 | 236 |
4.1%
|
|
| 1986 | 245 |
4.2%
|
|
| 1987 | 263 |
4.6%
|
|
| 1988 | 258 |
4.5%
|
|
| 1989 | 253 |
4.4%
|
|
| 1990 | 259 |
4.5%
|
|
| 1991 | 226 |
3.9%
|
|
| 1992 | 189 |
3.3%
|
|
| 1993 | 181 |
3.1%
|
|
| 1994 | 158 |
2.7%
|
|
| 1995 | 117 |
2%
|
|
| 1996 | 106 |
1.8%
|
|
| 1997 | 75 |
1.3%
|
|
| 1998 | 78 |
1.4%
|
|
| 1999 | 58 |
1%
|
|
| 2000 | 54 |
0.9%
|
|
| 2001 | 51 |
0.9%
|
|
| 2002 | 87 |
1.5%
|
|
| 2003 | 94 |
1.6%
|
|
| 2004 | 27 |
0.5%
|
|
| 9998 | DK | 1 |
0%
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 244 |
4.2%
|