| Value | Category | Cases | |
|---|---|---|---|
| 1968 | 37 |
0.4%
|
|
| 1969 | 86 |
1%
|
|
| 1970 | 131 |
1.5%
|
|
| 1971 | 88 |
1%
|
|
| 1972 | 152 |
1.8%
|
|
| 1973 | 107 |
1.3%
|
|
| 1974 | 123 |
1.4%
|
|
| 1975 | 165 |
1.9%
|
|
| 1976 | 123 |
1.4%
|
|
| 1977 | 132 |
1.5%
|
|
| 1978 | 142 |
1.7%
|
|
| 1979 | 153 |
1.8%
|
|
| 1980 | 155 |
1.8%
|
|
| 1981 | 143 |
1.7%
|
|
| 1982 | 167 |
2%
|
|
| 1983 | 194 |
2.3%
|
|
| 1984 | 168 |
2%
|
|
| 1985 | 183 |
2.1%
|
|
| 1986 | 174 |
2%
|
|
| 1987 | 184 |
2.2%
|
|
| 1988 | 230 |
2.7%
|
|
| 1989 | 208 |
2.4%
|
|
| 1990 | 204 |
2.4%
|
|
| 1991 | 194 |
2.3%
|
|
| 1992 | 203 |
2.4%
|
|
| 1993 | 176 |
2.1%
|
|
| 1994 | 200 |
2.3%
|
|
| 1995 | 218 |
2.6%
|
|
| 1996 | 238 |
2.8%
|
|
| 1997 | 235 |
2.8%
|
|
| 1998 | 268 |
3.1%
|
|
| 1999 | 292 |
3.4%
|
|
| 2000 | 298 |
3.5%
|
|
| 2001 | 257 |
3%
|
|
| 2002 | 262 |
3.1%
|
|
| 2003 | 163 |
1.9%
|
|
| 9998 | DK | 1 |
0%
|
| Sysmiss | 2067 |
24.3%
|