| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 1 |
2.2%
|
|
| 1996 | 1 |
2.2%
|
|
| 1998 | 3 |
6.7%
|
|
| 1999 | 1 |
2.2%
|
|
| 2006 | 2 |
4.4%
|
|
| 2011 | 8 |
17.8%
|
|
| 2015 | 9 |
20%
|
|
| 2016 | 11 |
24.4%
|
|
| 2017 | 9 |
20%
|
|
| Sysmiss | 1008 |