| Value | Category | Cases | |
|---|---|---|---|
| 0 | 131 |
87.3%
|
|
| 2007 | 1 |
0.7%
|
|
| 2009 | 1 |
0.7%
|
|
| 2014 | 2 |
1.3%
|
|
| 2015 | 1 |
0.7%
|
|
| 2016 | 6 |
4%
|
|
| 2017 | 7 |
4.7%
|
|
| 2018 | 1 |
0.7%
|
|
| Sysmiss | 2488 |