| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 1452 |
9.4%
|
|
| 2010 | 4287 |
27.7%
|
|
| 2011 | 3855 |
24.9%
|
|
| 2012 | 2689 |
17.4%
|
|
| 2013 | 2209 |
14.3%
|
|
| 2014 | 996 |
6.4%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 20942 |