| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 50 |
0.6%
|
|
| 2009 | 1169 |
14.6%
|
|
| 2010 | 1373 |
17.1%
|
|
| 2011 | 1664 |
20.8%
|
|
| 2012 | 1802 |
22.5%
|
|
| 2013 | 1881 |
23.5%
|
|
| 2014 | 72 |
0.9%
|
|
| 9997 | Inconsistent | 3 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 41193 |