| Value | Category | Cases | |
|---|---|---|---|
| 2010 | 2 |
12.5%
|
|
| 2011 | 2 |
12.5%
|
|
| 2012 | 2 |
12.5%
|
|
| 2013 | 5 |
31.3%
|
|
| 2014 | 5 |
31.3%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 36414 |