| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 10 |
0.6%
|
|
| 2001 | 22 |
1.2%
|
|
| 2002 | 247 |
13.8%
|
|
| 2003 | 281 |
15.8%
|
|
| 2004 | 293 |
16.4%
|
|
| 2005 | 302 |
16.9%
|
|
| 2006 | 354 |
19.8%
|
|
| 2007 | 275 |
15.4%
|
|
| Sysmiss | 1915 |