| Value | Category | Cases | |
|---|---|---|---|
| 0 | 11 |
68.8%
|
|
| 1998 | 1 |
6.3%
|
|
| 2010 | 1 |
6.3%
|
|
| 2014 | 1 |
6.3%
|
|
| 2016 | 1 |
6.3%
|
|
| 2017 | 1 |
6.3%
|
|
| Sysmiss | 2622 |