| Value | Category | Cases | |
|---|---|---|---|
| 1998 | 1 |
14.3%
|
|
| 2001 | 1 |
14.3%
|
|
| 2004 | 1 |
14.3%
|
|
| 2012 | 1 |
14.3%
|
|
| 2015 | 1 |
14.3%
|
|
| 2017 | 2 |
28.6%
|
|
| Sysmiss | 208 |