| Value | Category | Cases | |
|---|---|---|---|
| 2012 | 1 |
50%
|
|
| 2014 | 1 |
50%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 6479 |