| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 1 |
5%
|
|
| 2000 | 1 |
5%
|
|
| 2009 | 1 |
5%
|
|
| 2014 | 1 |
5%
|
|
| 2015 | 4 |
20%
|
|
| 2016 | 7 |
35%
|
|
| 2017 | 5 |
25%
|
|
| Sysmiss | 5338 |