| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 1 |
0.2%
|
|
| 1996 | 4 |
0.9%
|
|
| 1997 | 5 |
1.1%
|
|
| 1998 | 3 |
0.7%
|
|
| 1999 | 14 |
3.1%
|
|
| 2000 | 17 |
3.7%
|
|
| 2001 | 29 |
6.4%
|
|
| 2002 | 38 |
8.3%
|
|
| 2003 | 66 |
14.5%
|
|
| 2004 | 82 |
18%
|
|
| 2005 | 119 |
26.1%
|
|
| 2006 | 75 |
16.4%
|
|
| 2007 | 3 |
0.7%
|
|
| Sysmiss | 466 |