| Value | Category | Cases | |
|---|---|---|---|
| 1968 | 139 |
1.3%
|
|
| 1969 | 238 |
2.2%
|
|
| 1970 | 292 |
2.7%
|
|
| 1971 | 256 |
2.3%
|
|
| 1972 | 329 |
3%
|
|
| 1973 | 295 |
2.7%
|
|
| 1974 | 287 |
2.6%
|
|
| 1975 | 332 |
3%
|
|
| 1976 | 343 |
3.1%
|
|
| 1977 | 325 |
2.9%
|
|
| 1978 | 323 |
2.9%
|
|
| 1979 | 309 |
2.8%
|
|
| 1980 | 343 |
3.1%
|
|
| 1981 | 342 |
3.1%
|
|
| 1982 | 278 |
2.5%
|
|
| 1983 | 353 |
3.2%
|
|
| 1984 | 359 |
3.3%
|
|
| 1985 | 370 |
3.4%
|
|
| 1986 | 329 |
3%
|
|
| 1987 | 326 |
3%
|
|
| 1988 | 290 |
2.6%
|
|
| 1989 | 251 |
2.3%
|
|
| 1990 | 274 |
2.5%
|
|
| 1991 | 292 |
2.7%
|
|
| 1992 | 295 |
2.7%
|
|
| 1993 | 300 |
2.7%
|
|
| 1994 | 312 |
2.8%
|
|
| 1995 | 288 |
2.6%
|
|
| 1996 | 287 |
2.6%
|
|
| 1997 | 296 |
2.7%
|
|
| 1998 | 319 |
2.9%
|
|
| 1999 | 299 |
2.7%
|
|
| 2000 | 267 |
2.4%
|
|
| 2001 | 253 |
2.3%
|
|
| 2002 | 263 |
2.4%
|
|
| 2003 | 84 |
0.8%
|
|
| 9998 | DK | 21 |
0.2%
|
| Sysmiss | 458 |
4.2%
|