| Value | Category | Cases | |
|---|---|---|---|
| 1953 | 1953 | 1 |
0.5%
|
| 1956 | 1956 | 1 |
0.5%
|
| 1959 | 1959 | 1 |
0.5%
|
| 1960 | 1960 | 1 |
0.5%
|
| 1964 | 1964 | 1 |
0.5%
|
| 1965 | 1965 | 3 |
1.6%
|
| 1967 | 1967 | 1 |
0.5%
|
| 1968 | 1968 | 2 |
1%
|
| 1969 | 1969 | 1 |
0.5%
|
| 1970 | 1970 | 8 |
4.1%
|
| 1971 | 1971 | 4 |
2.1%
|
| 1972 | 1972 | 4 |
2.1%
|
| 1974 | 1974 | 2 |
1%
|
| 1975 | 1975 | 2 |
1%
|
| 1976 | 1976 | 4 |
2.1%
|
| 1977 | 1977 | 4 |
2.1%
|
| 1978 | 1978 | 5 |
2.6%
|
| 1979 | 1979 | 2 |
1%
|
| 1980 | 1980 | 9 |
4.7%
|
| 1981 | 1981 | 5 |
2.6%
|
| 1982 | 1982 | 5 |
2.6%
|
| 1983 | 1983 | 7 |
3.6%
|
| 1984 | 1984 | 6 |
3.1%
|
| 1985 | 1985 | 7 |
3.6%
|
| 1986 | 1986 | 6 |
3.1%
|
| 1987 | 1987 | 6 |
3.1%
|
| 1988 | 1988 | 5 |
2.6%
|
| 1989 | 1989 | 7 |
3.6%
|
| 1990 | 1990 | 11 |
5.7%
|
| 1991 | 1991 | 5 |
2.6%
|
| 1992 | 1992 | 4 |
2.1%
|
| 1993 | 1993 | 6 |
3.1%
|
| 1994 | 1994 | 3 |
1.6%
|
| 1995 | 1995 | 6 |
3.1%
|
| 1996 | 1996 | 3 |
1.6%
|
| 1997 | 1997 | 5 |
2.6%
|
| 1998 | 1998 | 8 |
4.1%
|
| 1999 | 1999 | 4 |
2.1%
|
| 2000 | 2000 | 10 |
5.2%
|
| 2001 | 2001 | 4 |
2.1%
|
| 2002 | 2002 | 1 |
0.5%
|
| 2004 | 2004 | 2 |
1%
|
| 2005 | 2005 | 3 |
1.6%
|
| 2006 | 2006 | 2 |
1%
|
| 2007 | 2007 | 2 |
1%
|
| 2008 | 2008 | 4 |
2.1%
|
| Sysmiss | 563 |