| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 72 |
1.8%
|
|
| 2002 | 655 |
16.8%
|
|
| 2003 | 622 |
15.9%
|
|
| 2004 | 653 |
16.7%
|
|
| 2005 | 633 |
16.2%
|
|
| 2006 | 708 |
18.1%
|
|
| 2007 | 562 |
14.4%
|
|
| Sysmiss | 26873 |