| Value | Category | Cases | |
|---|---|---|---|
| 2006 | 1 |
0.5%
|
|
| 2007 | 3 |
1.4%
|
|
| 2008 | 12 |
5.6%
|
|
| 2009 | 18 |
8.3%
|
|
| 2010 | 73 |
33.8%
|
|
| 2011 | 94 |
43.5%
|
|
| 9997 | Inconsistent (Secondary Editing) | 2 |
0.9%
|
| 9999 | Missing | 13 |
6%
|
| Sysmiss | 4556 |