| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 438 |
4.7%
|
|
| 2010 | 1510 |
16.2%
|
|
| 2011 | 1746 |
18.7%
|
|
| 2012 | 1877 |
20.1%
|
|
| 2013 | 2283 |
24.5%
|
|
| 2014 | 1480 |
15.9%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 11630 |