| Value | Category | Cases | |
|---|---|---|---|
| 1959 | 75 |
0.6%
|
|
| 1960 | 155 |
1.2%
|
|
| 1961 | 120 |
1%
|
|
| 1962 | 162 |
1.3%
|
|
| 1963 | 164 |
1.3%
|
|
| 1964 | 170 |
1.4%
|
|
| 1965 | 145 |
1.2%
|
|
| 1966 | 136 |
1.1%
|
|
| 1967 | 167 |
1.3%
|
|
| 1968 | 202 |
1.6%
|
|
| 1969 | 210 |
1.7%
|
|
| 1970 | 250 |
2%
|
|
| 1971 | 186 |
1.5%
|
|
| 1972 | 268 |
2.1%
|
|
| 1973 | 241 |
1.9%
|
|
| 1974 | 274 |
2.2%
|
|
| 1975 | 274 |
2.2%
|
|
| 1976 | 314 |
2.5%
|
|
| 1977 | 285 |
2.3%
|
|
| 1978 | 264 |
2.1%
|
|
| 1979 | 359 |
2.9%
|
|
| 1980 | 420 |
3.4%
|
|
| 1981 | 372 |
3%
|
|
| 1982 | 433 |
3.5%
|
|
| 1983 | 456 |
3.7%
|
|
| 1984 | 442 |
3.5%
|
|
| 1985 | 502 |
4%
|
|
| 1986 | 498 |
4%
|
|
| 1987 | 456 |
3.7%
|
|
| 1988 | 458 |
3.7%
|
|
| 1989 | 524 |
4.2%
|
|
| 1990 | 474 |
3.8%
|
|
| 1991 | 543 |
4.3%
|
|
| 1992 | 603 |
4.8%
|
|
| 1993 | 518 |
4.1%
|
|
| 1994 | 213 |
1.7%
|
|
| 9998 | dk | 5 |
0%
|
| 9999 | missing | 1 |
0%
|
| Sysmiss | 1149 |
9.2%
|