| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 1 |
0.2%
|
|
| 1996 | 5 |
1%
|
|
| 1997 | 4 |
0.8%
|
|
| 1998 | 5 |
1%
|
|
| 1999 | 18 |
3.7%
|
|
| 2000 | 16 |
3.3%
|
|
| 2001 | 36 |
7.5%
|
|
| 2002 | 42 |
8.7%
|
|
| 2003 | 63 |
13.1%
|
|
| 2004 | 97 |
20.1%
|
|
| 2005 | 116 |
24.1%
|
|
| 2006 | 77 |
16%
|
|
| 2007 | 2 |
0.4%
|
|
| Sysmiss | 440 |