| Value | Category | Cases | |
|---|---|---|---|
| 1983 | 1 |
1%
|
|
| 1985 | 2 |
2%
|
|
| 1987 | 2 |
2%
|
|
| 1988 | 1 |
1%
|
|
| 1989 | 1 |
1%
|
|
| 1990 | 2 |
2%
|
|
| 1991 | 4 |
4%
|
|
| 1992 | 3 |
3%
|
|
| 1993 | 5 |
5%
|
|
| 1994 | 4 |
4%
|
|
| 1995 | 9 |
8.9%
|
|
| 1996 | 9 |
8.9%
|
|
| 1997 | 5 |
5%
|
|
| 1998 | 6 |
5.9%
|
|
| 1999 | 11 |
10.9%
|
|
| 2000 | 34 |
33.7%
|
|
| 9997 | Inconsistent | 1 |
1%
|
| 9998 | DK | 1 |
1%
|
| 9999 | 3 | ||
| Sysmiss | 14805 |