| Value | Category | Cases | |
|---|---|---|---|
| 1968 | 41 |
1.5%
|
|
| 1969 | 60 |
2.2%
|
|
| 1970 | 52 |
1.9%
|
|
| 1971 | 53 |
2%
|
|
| 1972 | 67 |
2.5%
|
|
| 1973 | 61 |
2.3%
|
|
| 1974 | 64 |
2.4%
|
|
| 1975 | 82 |
3.1%
|
|
| 1976 | 59 |
2.2%
|
|
| 1977 | 76 |
2.8%
|
|
| 1978 | 67 |
2.5%
|
|
| 1979 | 67 |
2.5%
|
|
| 1980 | 68 |
2.5%
|
|
| 1981 | 73 |
2.7%
|
|
| 1982 | 79 |
3%
|
|
| 1983 | 55 |
2.1%
|
|
| 1984 | 57 |
2.1%
|
|
| 1985 | 73 |
2.7%
|
|
| 1986 | 65 |
2.4%
|
|
| 1987 | 76 |
2.8%
|
|
| 1988 | 74 |
2.8%
|
|
| 1989 | 85 |
3.2%
|
|
| 1990 | 82 |
3.1%
|
|
| 1991 | 64 |
2.4%
|
|
| 1992 | 90 |
3.4%
|
|
| 1993 | 73 |
2.7%
|
|
| 1994 | 72 |
2.7%
|
|
| 1995 | 67 |
2.5%
|
|
| 1996 | 74 |
2.8%
|
|
| 1997 | 85 |
3.2%
|
|
| 1998 | 81 |
3%
|
|
| 1999 | 72 |
2.7%
|
|
| 2000 | 84 |
3.1%
|
|
| 2001 | 53 |
2%
|
|
| 2002 | 71 |
2.7%
|
|
| 2003 | 18 |
0.7%
|
|
| 9998 | DK YEAR | 5 |
0.2%
|
| Sysmiss | 228 |
8.5%
|