| Value | Category | Cases | |
|---|---|---|---|
| -95 | Missing | 0 |
0%
|
| 1979 | 1 |
0.7%
|
|
| 2005 | 17 |
12.3%
|
|
| 2006 | 52 |
37.7%
|
|
| 2007 | 3 |
2.2%
|
|
| 2008 | 1 |
0.7%
|
|
| 2009 | 5 |
3.6%
|
|
| 2010 | 46 |
33.3%
|
|
| 2011 | 13 |
9.4%
|
|
| Sysmiss | 72 |