| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 5 |
2.5%
|
|
| 2001 | 14 |
6.9%
|
|
| 2002 | 44 |
21.8%
|
|
| 2003 | 39 |
19.3%
|
|
| 2004 | 62 |
30.7%
|
|
| 2005 | 35 |
17.3%
|
|
| 2006 | 3 |
1.5%
|
|
| Sysmiss | 7932 |