| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 52 |
6.4%
|
|
| 2008 | 154 |
18.8%
|
|
| 2009 | 173 |
21.2%
|
|
| 2010 | 176 |
21.5%
|
|
| 2011 | 161 |
19.7%
|
|
| 2012 | 101 |
12.4%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 20 |