| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 6 |
3.8%
|
|
| 2008 | 1 |
0.6%
|
|
| 2009 | 5 |
3.2%
|
|
| 2010 | 46 |
29.5%
|
|
| 2011 | 21 |
13.5%
|
|
| 9997 | Inconsistent (Secondary Editing) | 0 |
0%
|
| 9999 | Missing | 77 |
49.4%
|
| Sysmiss | 4671 |