| Value | Category | Cases | |
|---|---|---|---|
| 2010 | 1 |
0%
|
|
| 2011 | 3 |
0.1%
|
|
| 2012 | 3217 |
97.7%
|
|
| 2013 | 71 |
2.2%
|
|
| Sysmiss | 1882 |