| Value | Category | Cases | |
|---|---|---|---|
| 1986 | 3 |
0.4%
|
|
| 1987 | 1 |
0.1%
|
|
| 1988 | 2 |
0.3%
|
|
| 1989 | 1 |
0.1%
|
|
| 1990 | 2 |
0.3%
|
|
| 1991 | 4 |
0.5%
|
|
| 1992 | 13 |
1.7%
|
|
| 1993 | 10 |
1.3%
|
|
| 1994 | 13 |
1.7%
|
|
| 1995 | 24 |
3.1%
|
|
| 1996 | 24 |
3.1%
|
|
| 1997 | 23 |
3%
|
|
| 1998 | 42 |
5.4%
|
|
| 1999 | 36 |
4.6%
|
|
| 2000 | 58 |
7.5%
|
|
| 2001 | 68 |
8.8%
|
|
| 2002 | 68 |
8.8%
|
|
| 2003 | 70 |
9%
|
|
| 2004 | 67 |
8.6%
|
|
| 2005 | 75 |
9.7%
|
|
| 2006 | 75 |
9.7%
|
|
| 2007 | 68 |
8.8%
|
|
| 2008 | 30 |
3.9%
|
|
| 9998 | dk | 0 |
0%
|
| Sysmiss | 50531 |