| Value | Category | Cases | |
|---|---|---|---|
| 1984 | 3 |
1.2%
|
|
| 1985 | 1 |
0.4%
|
|
| 1986 | 2 |
0.8%
|
|
| 1987 | 3 |
1.2%
|
|
| 1989 | 2 |
0.8%
|
|
| 1990 | 5 |
2%
|
|
| 1991 | 1 |
0.4%
|
|
| 1992 | 6 |
2.5%
|
|
| 1993 | 7 |
2.9%
|
|
| 1994 | 11 |
4.5%
|
|
| 1995 | 3 |
1.2%
|
|
| 1996 | 10 |
4.1%
|
|
| 1997 | 4 |
1.6%
|
|
| 1998 | 9 |
3.7%
|
|
| 1999 | 10 |
4.1%
|
|
| 2000 | 13 |
5.3%
|
|
| 2001 | 15 |
6.1%
|
|
| 2002 | 26 |
10.7%
|
|
| 2003 | 19 |
7.8%
|
|
| 2004 | 31 |
12.7%
|
|
| 2005 | 40 |
16.4%
|
|
| 2006 | 21 |
8.6%
|
|
| 9997 | Missing | 0 |
0%
|
| 9998 | DK | 2 |
0.8%
|
| Sysmiss | 140 |