| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 |
1.8%
|
|
| 2013 | 1 |
1.8%
|
|
| 2014 | 42 |
75%
|
|
| 2015 | 11 |
19.6%
|
|
| 9999 | 1 |
1.8%
|
|
| Sysmiss | 169 |