| Value | Category | Cases | |
|---|---|---|---|
| 1960 | 238 | 
                                    
                                    2.3%
                                 | |
| 1962 | 2 | 
                                    
                                    0%
                                 | |
| 1963 | 22 | 
                                    
                                    0.2%
                                 | |
| 1964 | 1 | 
                                    
                                    0%
                                 | |
| 1965 | 29 | 
                                    
                                    0.3%
                                 | |
| 1966 | 8 | 
                                    
                                    0.1%
                                 | |
| 1967 | 2 | 
                                    
                                    0%
                                 | |
| 1968 | 4 | 
                                    
                                    0%
                                 | |
| 1969 | 3 | 
                                    
                                    0%
                                 | |
| 1970 | 83 | 
                                    
                                    0.8%
                                 | |
| 1971 | 2 | 
                                    
                                    0%
                                 | |
| 1972 | 10 | 
                                    
                                    0.1%
                                 | |
| 1973 | 27 | 
                                    
                                    0.3%
                                 | |
| 1974 | 13 | 
                                    
                                    0.1%
                                 | |
| 1975 | 116 | 
                                    
                                    1.1%
                                 | |
| 1976 | 64 | 
                                    
                                    0.6%
                                 | |
| 1977 | 7 | 
                                    
                                    0.1%
                                 | |
| 1978 | 53 | 
                                    
                                    0.5%
                                 | |
| 1979 | 42 | 
                                    
                                    0.4%
                                 | |
| 1980 | 305 | 
                                    
                                    2.9%
                                 | |
| 1981 | 42 | 
                                    
                                    0.4%
                                 | |
| 1982 | 35 | 
                                    
                                    0.3%
                                 | |
| 1983 | 54 | 
                                    
                                    0.5%
                                 | |
| 1984 | 15 | 
                                    
                                    0.1%
                                 | |
| 1985 | 140 | 
                                    
                                    1.3%
                                 | |
| 1986 | 49 | 
                                    
                                    0.5%
                                 | |
| 1987 | 57 | 
                                    
                                    0.5%
                                 | |
| 1988 | 26 | 
                                    
                                    0.3%
                                 | |
| 1989 | 40 | 
                                    
                                    0.4%
                                 | |
| 1990 | 161 | 
                                    
                                    1.6%
                                 | |
| 1991 | 12 | 
                                    
                                    0.1%
                                 | |
| 1992 | 57 | 
                                    
                                    0.5%
                                 | |
| 1993 | 72 | 
                                    
                                    0.7%
                                 | |
| 1994 | 31 | 
                                    
                                    0.3%
                                 | |
| 1995 | 160 | 
                                    
                                    1.5%
                                 | |
| 1996 | 90 | 
                                    
                                    0.9%
                                 | |
| 1997 | 102 | 
                                    
                                    1%
                                 | |
| 1998 | 272 | 
                                    
                                    2.6%
                                 | |
| 1999 | 176 | 
                                    
                                    1.7%
                                 | |
| 2000 | 629 | 
                                    
                                    6.1%
                                 | |
| 2001 | 246 | 
                                    
                                    2.4%
                                 | |
| 2002 | 208 | 
                                    
                                    2%
                                 | |
| 2003 | 350 | 
                                    
                                    3.4%
                                 | |
| 2004 | 176 | 
                                    
                                    1.7%
                                 | |
| 2005 | 289 | 
                                    
                                    2.8%
                                 | |
| 2006 | 246 | 
                                    
                                    2.4%
                                 | |
| 2007 | 190 | 
                                    
                                    1.8%
                                 | |
| 2008 | 289 | 
                                    
                                    2.8%
                                 | |
| 2009 | 297 | 
                                    
                                    2.9%
                                 | |
| 2010 | 445 | 
                                    
                                    4.3%
                                 | |
| 2011 | 274 | 
                                    
                                    2.6%
                                 | |
| 2012 | 328 | 
                                    
                                    3.2%
                                 | |
| 2013 | 450 | 
                                    
                                    4.3%
                                 | |
| 2014 | 246 | 
                                    
                                    2.4%
                                 | |
| 2015 | 483 | 
                                    
                                    4.7%
                                 | |
| 2016 | 291 | 
                                    
                                    2.8%
                                 | |
| 2017 | 341 | 
                                    
                                    3.3%
                                 | |
| 2018 | 469 | 
                                    
                                    4.5%
                                 | |
| 2019 | 478 | 
                                    
                                    4.6%
                                 | |
| 2020 | 456 | 
                                    
                                    4.4%
                                 | |
| 2021 | 321 | 
                                    
                                    3.1%
                                 | |
| 2022 | 204 | 
                                    
                                    2%
                                 | |
| 2023 | 43 | 
                                    
                                    0.4%
                                 |