| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 1 |
9.1%
|
|
| 2002 | 2 |
18.2%
|
|
| 2003 | 3 |
27.3%
|
|
| 2004 | 3 |
27.3%
|
|
| 2005 | 2 |
18.2%
|
|
| Sysmiss | 6759 |