| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 1 |
2.5%
|
|
| 2004 | 1 |
2.5%
|
|
| 2005 | 28 |
70%
|
|
| 2006 | 10 |
25%
|
|
| Sysmiss | 844 |