| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 0 | 26 | 3219 |
67.2%
|
|
| 2006 | 1 | 86 |
1.8%
|
|
| 2007 | 5 | 372 |
7.8%
|
|
| 2008 | 8 | 908 |
19%
|
|
| 2009 | 1 | 203 |
4.2%
|
|
| Sysmiss | 2 | 150 |