| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
3.3%
|
|
| 2001 | 1 |
3.3%
|
|
| 2002 | 1 |
3.3%
|
|
| 2004 | 1 |
3.3%
|
|
| 2005 | 8 |
26.7%
|
|
| 2006 | 4 |
13.3%
|
|
| 2007 | 9 |
30%
|
|
| 2008 | 5 |
16.7%
|
|
| Sysmiss | 9274 |