| Value | Category | Cases | |
|---|---|---|---|
| 1999 | 2 |
0.4%
|
|
| 2000 | 22 |
4.4%
|
|
| 2001 | 24 |
4.8%
|
|
| 2002 | 46 |
9.3%
|
|
| 2003 | 77 |
15.5%
|
|
| 2004 | 135 |
27.2%
|
|
| 2005 | 173 |
34.9%
|
|
| 2006 | 17 |
3.4%
|
|
| Sysmiss | 7638 |