| Value | Category | Cases | |
|---|---|---|---|
| -999999999 | 1 |
0%
|
|
| 99 | MISSING | 79 |
0.2%
|
| 2015 | 2015 | 2284 |
5.6%
|
| 2016 | 2016 | 19454 |
47.5%
|
| 2017 | 2017 | 19172 |
46.8%
|
| Sysmiss | 1448 |