| Value | Category | Cases | |
|---|---|---|---|
| -95 | Missing | 0 |
0%
|
| 1979 | 1 |
0.5%
|
|
| 2005 | 21 |
10.5%
|
|
| 2006 | 85 |
42.5%
|
|
| 2007 | 6 |
3%
|
|
| 2009 | 3 |
1.5%
|
|
| 2010 | 72 |
36%
|
|
| 2011 | 12 |
6%
|
|
| Sysmiss | 10 |