| Value | Category | Cases | |
|---|---|---|---|
| 1982 | 2 |
0.3%
|
|
| 1983 | 1 |
0.2%
|
|
| 1984 | 3 |
0.5%
|
|
| 1985 | 8 |
1.3%
|
|
| 1986 | 8 |
1.3%
|
|
| 1987 | 18 |
3%
|
|
| 1988 | 21 |
3.5%
|
|
| 1989 | 24 |
4%
|
|
| 1990 | 29 |
4.9%
|
|
| 1991 | 46 |
7.8%
|
|
| 1992 | 49 |
8.3%
|
|
| 1993 | 57 |
9.6%
|
|
| 1994 | 64 |
10.8%
|
|
| 1995 | 40 |
6.7%
|
|
| 1996 | 47 |
7.9%
|
|
| 1997 | 63 |
10.6%
|
|
| 1998 | 46 |
7.8%
|
|
| 1999 | 44 |
7.4%
|
|
| 2000 | 22 |
3.7%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | dk | 1 |
0.2%
|
| Sysmiss | 14758 |