| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 69 |
1.9%
|
|
| 2002 | 623 |
16.8%
|
|
| 2003 | 587 |
15.9%
|
|
| 2004 | 622 |
16.8%
|
|
| 2005 | 602 |
16.3%
|
|
| 2006 | 667 |
18%
|
|
| 2007 | 529 |
14.3%
|
|
| Sysmiss | 25258 |