| Value | Category | Cases | |
|---|---|---|---|
| 1964 | 61 |
0.1%
|
|
| 1965 | 960 |
1.6%
|
|
| 1966 | 790 |
1.3%
|
|
| 1967 | 686 |
1.1%
|
|
| 1968 | 888 |
1.4%
|
|
| 1969 | 1194 |
1.9%
|
|
| 1970 | 1200 |
2%
|
|
| 1971 | 675 |
1.1%
|
|
| 1972 | 956 |
1.6%
|
|
| 1973 | 675 |
1.1%
|
|
| 1974 | 1392 |
2.3%
|
|
| 1975 | 1197 |
2%
|
|
| 1976 | 1074 |
1.8%
|
|
| 1977 | 822 |
1.3%
|
|
| 1978 | 1194 |
1.9%
|
|
| 1979 | 1733 |
2.8%
|
|
| 1980 | 1548 |
2.5%
|
|
| 1981 | 1036 |
1.7%
|
|
| 1982 | 1641 |
2.7%
|
|
| 1983 | 1048 |
1.7%
|
|
| 1984 | 2111 |
3.4%
|
|
| 1985 | 1445 |
2.4%
|
|
| 1986 | 1738 |
2.8%
|
|
| 1987 | 1488 |
2.4%
|
|
| 1988 | 1985 |
3.2%
|
|
| 1989 | 2309 |
3.8%
|
|
| 1990 | 1819 |
3%
|
|
| 1991 | 1632 |
2.7%
|
|
| 1992 | 2167 |
3.5%
|
|
| 1993 | 1707 |
2.8%
|
|
| 1994 | 2469 |
4%
|
|
| 1995 | 1996 |
3.3%
|
|
| 1996 | 2698 |
4.4%
|
|
| 1997 | 1969 |
3.2%
|
|
| 1998 | 2380 |
3.9%
|
|
| 1999 | 1554 |
2.5%
|
|
| 9997 | Inconsistent | 96 |
0.2%
|
| 9998 | DK | 1330 |
2.2%
|
| 9999 | Missing | 5 |
0%
|
| Sysmiss | 7618 |
12.4%
|