| Value | Category | Cases | |
|---|---|---|---|
| 0 | 8 |
0.1%
|
|
| 1964 | 1 |
0%
|
|
| 1965 | 1 |
0%
|
|
| 1969 | 1 |
0%
|
|
| 1971 | 2 |
0%
|
|
| 1972 | 3 |
0.1%
|
|
| 1973 | 1 |
0%
|
|
| 1974 | 5 |
0.1%
|
|
| 1975 | 5 |
0.1%
|
|
| 1976 | 11 |
0.2%
|
|
| 1977 | 12 |
0.2%
|
|
| 1978 | 18 |
0.3%
|
|
| 1979 | 29 |
0.5%
|
|
| 1980 | 231 |
4%
|
|
| 1981 | 131 |
2.3%
|
|
| 1982 | 114 |
2%
|
|
| 1983 | 67 |
1.2%
|
|
| 1984 | 118 |
2%
|
|
| 1985 | 81 |
1.4%
|
|
| 1986 | 158 |
2.7%
|
|
| 1987 | 111 |
1.9%
|
|
| 1988 | 78 |
1.4%
|
|
| 1989 | 183 |
3.2%
|
|
| 1990 | 139 |
2.4%
|
|
| 1991 | 176 |
3.1%
|
|
| 1992 | 183 |
3.2%
|
|
| 1993 | 316 |
5.5%
|
|
| 1994 | 164 |
2.8%
|
|
| 1995 | 139 |
2.4%
|
|
| 1996 | 131 |
2.3%
|
|
| 1997 | 145 |
2.5%
|
|
| 1998 | 163 |
2.8%
|
|
| 1999 | 179 |
3.1%
|
|
| 2000 | 187 |
3.2%
|
|
| 2001 | 302 |
5.2%
|
|
| 2002 | 243 |
4.2%
|
|
| 2003 | 387 |
6.7%
|
|
| 2004 | 492 |
8.5%
|
|
| 2005 | 463 |
8%
|
|
| 2006 | 415 |
7.2%
|
|
| 2007 | 172 |
3%
|
|
| 2008 | 1 |
0%
|
|
| Sysmiss | 276 |