| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 23 |
0.3%
|
|
| 2009 | 1084 |
13.4%
|
|
| 2010 | 1385 |
17.2%
|
|
| 2011 | 1669 |
20.7%
|
|
| 2012 | 1865 |
23.1%
|
|
| 2013 | 1949 |
24.2%
|
|
| 2014 | 92 |
1.1%
|
|
| 9997 | Inconsistent | 3 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 41137 |