| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 1 |
9.1%
|
|
| 2013 | 2 |
18.2%
|
|
| 2014 | 7 |
63.6%
|
|
| 2015 | 1 |
9.1%
|
|
| Sysmiss | 405 |