| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 7 |
0.3%
|
|
| 2001 | 35 |
1.7%
|
|
| 2002 | 291 |
13.8%
|
|
| 2003 | 326 |
15.5%
|
|
| 2004 | 337 |
16%
|
|
| 2005 | 370 |
17.6%
|
|
| 2006 | 387 |
18.4%
|
|
| 2007 | 352 |
16.7%
|
|
| Sysmiss | 1594 |