| Value | Category | Cases | |
|---|---|---|---|
| 2012 | 1 |
0.1%
|
|
| 2013 | 4 |
0.4%
|
|
| 2014 | 107 |
11%
|
|
| 2015 | 859 |
88.5%
|
|
| Sysmiss | 449 |