| Valor | Categoría | Casos | |
|---|---|---|---|
| 1930 | 1 | 
                                    
                                    0.1%
                                 | |
| 1940 | 1 | 
                                    
                                    0.1%
                                 | |
| 1950 | 1 | 
                                    
                                    0.1%
                                 | |
| 1952 | 1 | 
                                    
                                    0.1%
                                 | |
| 1960 | 2 | 
                                    
                                    0.2%
                                 | |
| 1962 | 4 | 
                                    
                                    0.4%
                                 | |
| 1967 | 1 | 
                                    
                                    0.1%
                                 | |
| 1969 | 2 | 
                                    
                                    0.2%
                                 | |
| 1970 | 4 | 
                                    
                                    0.4%
                                 | |
| 1972 | 5 | 
                                    
                                    0.5%
                                 | |
| 1974 | 5 | 
                                    
                                    0.5%
                                 | |
| 1977 | 6 | 
                                    
                                    0.6%
                                 | |
| 1979 | 2 | 
                                    
                                    0.2%
                                 | |
| 1980 | 8 | 
                                    
                                    0.7%
                                 | |
| 1981 | 1 | 
                                    
                                    0.1%
                                 | |
| 1982 | 17 | 
                                    
                                    1.6%
                                 | |
| 1983 | 5 | 
                                    
                                    0.5%
                                 | |
| 1984 | 2 | 
                                    
                                    0.2%
                                 | |
| 1985 | 6 | 
                                    
                                    0.6%
                                 | |
| 1987 | 15 | 
                                    
                                    1.4%
                                 | |
| 1988 | 1 | 
                                    
                                    0.1%
                                 | |
| 1989 | 10 | 
                                    
                                    0.9%
                                 | |
| 1990 | 10 | 
                                    
                                    0.9%
                                 | |
| 1991 | 3 | 
                                    
                                    0.3%
                                 | |
| 1992 | 44 | 
                                    
                                    4.1%
                                 | |
| 1993 | 11 | 
                                    
                                    1%
                                 | |
| 1994 | 7 | 
                                    
                                    0.7%
                                 | |
| 1995 | 7 | 
                                    
                                    0.7%
                                 | |
| 1996 | 9 | 
                                    
                                    0.8%
                                 | |
| 1997 | 40 | 
                                    
                                    3.7%
                                 | |
| 1998 | 22 | 
                                    
                                    2.1%
                                 | |
| 1999 | 11 | 
                                    
                                    1%
                                 | |
| 2000 | 32 | 
                                    
                                    3%
                                 | |
| 2001 | 15 | 
                                    
                                    1.4%
                                 | |
| 2002 | 59 | 
                                    
                                    5.5%
                                 | |
| 2003 | 25 | 
                                    
                                    2.3%
                                 | |
| 2004 | 30 | 
                                    
                                    2.8%
                                 | |
| 2005 | 45 | 
                                    
                                    4.2%
                                 | |
| 2006 | 47 | 
                                    
                                    4.4%
                                 | |
| 2007 | 56 | 
                                    
                                    5.2%
                                 | |
| 2008 | 62 | 
                                    
                                    5.8%
                                 | |
| 2009 | 72 | 
                                    
                                    6.7%
                                 | |
| 2010 | 110 | 
                                    
                                    10.3%
                                 | |
| 2011 | 88 | 
                                    
                                    8.2%
                                 | |
| 2012 | 137 | 
                                    
                                    12.8%
                                 | |
| 2013 | 1 | 
                                    
                                    0.1%
                                 | |
| 9999 | 26 | 
                                    
                                    2.4%
                                 |