| Value | Category | Cases | |
|---|---|---|---|
| 1986 | 1 |
0%
|
|
| 1988 | 1 |
0%
|
|
| 1989 | 1 |
0%
|
|
| 1990 | 4 |
0.1%
|
|
| 1995 | 4 |
0.1%
|
|
| 1996 | 2 |
0.1%
|
|
| 1997 | 6 |
0.2%
|
|
| 1998 | 9 |
0.3%
|
|
| 1999 | 8 |
0.3%
|
|
| 2000 | 51 |
1.6%
|
|
| 2001 | 41 |
1.3%
|
|
| 2002 | 76 |
2.4%
|
|
| 2003 | 175 |
5.6%
|
|
| 2004 | 786 |
25.1%
|
|
| 2005 | 1642 |
52.4%
|
|
| 2006 | 329 |
10.5%
|
|
| Sysmiss | 5807 |