| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 1 |
1.4%
|
|
| 1998 | 1 |
1.4%
|
|
| 2000 | 2 |
2.8%
|
|
| 2003 | 5 |
6.9%
|
|
| 2004 | 3 |
4.2%
|
|
| 2005 | 7 |
9.7%
|
|
| 2006 | 8 |
11.1%
|
|
| 2007 | 33 |
45.8%
|
|
| 2008 | 12 |
16.7%
|
|
| Sysmiss | 745 |