| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 1 |
0.2%
|
|
| 1996 | 5 |
1%
|
|
| 1997 | 5 |
1%
|
|
| 1998 | 6 |
1.2%
|
|
| 1999 | 17 |
3.4%
|
|
| 2000 | 17 |
3.4%
|
|
| 2001 | 35 |
7.1%
|
|
| 2002 | 46 |
9.3%
|
|
| 2003 | 67 |
13.5%
|
|
| 2004 | 96 |
19.4%
|
|
| 2005 | 117 |
23.6%
|
|
| 2006 | 82 |
16.5%
|
|
| 2007 | 2 |
0.4%
|
|
| Sysmiss | 426 |