| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 3 |
0%
|
|
| 2014 | 1 |
0%
|
|
| 2015 | 122 |
1.9%
|
|
| 2016 | 815 |
13%
|
|
| 2017 | 796 |
12.7%
|
|
| 2018 | 776 |
12.4%
|
|
| 9999 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 3754 |
59.9%
|