| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 6 |
22.2%
|
|
| 2004 | 4 |
14.8%
|
|
| 2005 | 3 |
11.1%
|
|
| 2006 | 13 |
48.1%
|
|
| 2007 | 1 |
3.7%
|
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 943 |