| Value | Category | Cases | |
|---|---|---|---|
| 1 | Before 2007 | 876 |
10.4%
|
| 2 | 2008 | 464 |
5.5%
|
| 3 | 2009 | 729 |
8.7%
|
| 4 | 2010 | 1750 |
20.8%
|
| 5 | 2011 | 4319 |
51.3%
|
| 6 | 2012 | 133 |
1.6%
|
| 7 | Not specified | 141 |
1.7%
|
| Sysmiss | 8933 |