| Value | Category | Cases | |
|---|---|---|---|
| 1966 | 1 |
0%
|
|
| 1967 | 1 |
0%
|
|
| 1968 | 5 |
0.1%
|
|
| 1969 | 36 |
0.5%
|
|
| 1970 | 74 |
0.9%
|
|
| 1971 | 67 |
0.8%
|
|
| 1972 | 82 |
1%
|
|
| 1973 | 99 |
1.2%
|
|
| 1974 | 135 |
1.7%
|
|
| 1975 | 133 |
1.7%
|
|
| 1976 | 153 |
1.9%
|
|
| 1977 | 133 |
1.7%
|
|
| 1978 | 181 |
2.3%
|
|
| 1979 | 189 |
2.4%
|
|
| 1980 | 286 |
3.6%
|
|
| 1981 | 164 |
2.1%
|
|
| 1982 | 274 |
3.4%
|
|
| 1983 | 238 |
3%
|
|
| 1984 | 284 |
3.6%
|
|
| 1985 | 257 |
3.2%
|
|
| 1986 | 311 |
3.9%
|
|
| 1987 | 248 |
3.1%
|
|
| 1988 | 278 |
3.5%
|
|
| 1989 | 260 |
3.3%
|
|
| 1990 | 311 |
3.9%
|
|
| 1991 | 297 |
3.7%
|
|
| 1992 | 303 |
3.8%
|
|
| 1993 | 291 |
3.7%
|
|
| 1994 | 363 |
4.6%
|
|
| 1995 | 359 |
4.5%
|
|
| 1996 | 378 |
4.8%
|
|
| 1997 | 382 |
4.8%
|
|
| 1998 | 402 |
5.1%
|
|
| 1999 | 517 |
6.5%
|
|
| 2000 | 320 |
4%
|
|
| 9997 | Missing | 141 |
1.8%
|
| 9999 | Don't know | 0 |
0%
|
| Sysmiss | 2572 |