| Value | Category | Cases | |
|---|---|---|---|
| 1924 | 1 | 
                                    
                                    0%
                                 | |
| 1941 | 1 | 
                                    
                                    0%
                                 | |
| 1943 | 1 | 
                                    
                                    0%
                                 | |
| 1947 | 2 | 
                                    
                                    0.1%
                                 | |
| 1948 | 1 | 
                                    
                                    0%
                                 | |
| 1949 | 1 | 
                                    
                                    0%
                                 | |
| 1950 | 1 | 
                                    
                                    0%
                                 | |
| 1951 | 1 | 
                                    
                                    0%
                                 | |
| 1952 | 1 | 
                                    
                                    0%
                                 | |
| 1953 | 4 | 
                                    
                                    0.2%
                                 | |
| 1954 | 3 | 
                                    
                                    0.1%
                                 | |
| 1955 | 3 | 
                                    
                                    0.1%
                                 | |
| 1956 | 2 | 
                                    
                                    0.1%
                                 | |
| 1957 | 7 | 
                                    
                                    0.3%
                                 | |
| 1958 | 8 | 
                                    
                                    0.4%
                                 | |
| 1959 | 3 | 
                                    
                                    0.1%
                                 | |
| 1960 | 3 | 
                                    
                                    0.1%
                                 | |
| 1961 | 4 | 
                                    
                                    0.2%
                                 | |
| 1962 | 7 | 
                                    
                                    0.3%
                                 | |
| 1963 | 2 | 
                                    
                                    0.1%
                                 | |
| 1964 | 7 | 
                                    
                                    0.3%
                                 | |
| 1965 | 8 | 
                                    
                                    0.4%
                                 | |
| 1966 | 7 | 
                                    
                                    0.3%
                                 | |
| 1967 | 6 | 
                                    
                                    0.3%
                                 | |
| 1968 | 10 | 
                                    
                                    0.5%
                                 | |
| 1969 | 7 | 
                                    
                                    0.3%
                                 | |
| 1970 | 11 | 
                                    
                                    0.5%
                                 | |
| 1971 | 8 | 
                                    
                                    0.4%
                                 | |
| 1972 | 8 | 
                                    
                                    0.4%
                                 | |
| 1973 | 13 | 
                                    
                                    0.6%
                                 | |
| 1974 | 14 | 
                                    
                                    0.7%
                                 | |
| 1975 | 15 | 
                                    
                                    0.7%
                                 | |
| 1976 | 7 | 
                                    
                                    0.3%
                                 | |
| 1977 | 23 | 
                                    
                                    1.1%
                                 | |
| 1978 | 24 | 
                                    
                                    1.2%
                                 | |
| 1979 | 14 | 
                                    
                                    0.7%
                                 | |
| 1980 | 15 | 
                                    
                                    0.7%
                                 | |
| 1981 | 23 | 
                                    
                                    1.1%
                                 | |
| 1982 | 32 | 
                                    
                                    1.6%
                                 | |
| 1983 | 27 | 
                                    
                                    1.3%
                                 | |
| 1984 | 38 | 
                                    
                                    1.9%
                                 | |
| 1985 | 27 | 
                                    
                                    1.3%
                                 | |
| 1986 | 21 | 
                                    
                                    1%
                                 | |
| 1987 | 19 | 
                                    
                                    0.9%
                                 | |
| 1988 | 36 | 
                                    
                                    1.8%
                                 | |
| 1989 | 31 | 
                                    
                                    1.5%
                                 | |
| 1990 | 31 | 
                                    
                                    1.5%
                                 | |
| 1991 | 25 | 
                                    
                                    1.2%
                                 | |
| 1992 | 36 | 
                                    
                                    1.8%
                                 | |
| 1993 | 29 | 
                                    
                                    1.4%
                                 | |
| 1994 | 36 | 
                                    
                                    1.8%
                                 | |
| 1995 | 34 | 
                                    
                                    1.7%
                                 | |
| 1996 | 44 | 
                                    
                                    2.2%
                                 | |
| 1997 | 49 | 
                                    
                                    2.4%
                                 | |
| 1998 | 36 | 
                                    
                                    1.8%
                                 | |
| 1999 | 31 | 
                                    
                                    1.5%
                                 | |
| 2000 | 52 | 
                                    
                                    2.5%
                                 | |
| 2001 | 39 | 
                                    
                                    1.9%
                                 | |
| 2002 | 54 | 
                                    
                                    2.6%
                                 | |
| 2003 | 48 | 
                                    
                                    2.4%
                                 | |
| 2004 | 37 | 
                                    
                                    1.8%
                                 | |
| 2005 | 64 | 
                                    
                                    3.1%
                                 | |
| 2006 | 53 | 
                                    
                                    2.6%
                                 | |
| 2007 | 86 | 
                                    
                                    4.2%
                                 | |
| 2008 | 98 | 
                                    
                                    4.8%
                                 | |
| 2009 | 109 | 
                                    
                                    5.3%
                                 | |
| 2010 | 120 | 
                                    
                                    5.9%
                                 | |
| 2011 | 110 | 
                                    
                                    5.4%
                                 | |
| 2012 | 124 | 
                                    
                                    6.1%
                                 | |
| 2013 | 106 | 
                                    
                                    5.2%
                                 | |
| 2014 | 20 | 
                                    
                                    1%
                                 | |
| 2015 | 5 | 
                                    
                                    0.2%
                                 | |
| 9999 | DON'T KNOW | 57 | 
                                    
                                    2.8%
                                 | 
| Sysmiss | 2702 |