| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
20%
|
|
| 2004 | 1 |
20%
|
|
| 2010 | 1 |
20%
|
|
| 2011 | 1 |
20%
|
|
| 2012 | 1 |
20%
|
|
| Sysmiss | 458 |