| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 1 |
3.8%
|
|
| 2000 | 1 |
3.8%
|
|
| 2007 | 2 |
7.7%
|
|
| 2010 | 1 |
3.8%
|
|
| 2014 | 1 |
3.8%
|
|
| 2015 | 6 |
23.1%
|
|
| 2016 | 8 |
30.8%
|
|
| 2017 | 6 |
23.1%
|
|
| Sysmiss | 5332 |