| Value | Category | Cases | |
|---|---|---|---|
| 99 | Missing | 0 |
0%
|
| 1998 | 1 |
5.3%
|
|
| 2000 | 1 |
5.3%
|
|
| 2002 | 1 |
5.3%
|
|
| 2006 | 1 |
5.3%
|
|
| 2008 | 1 |
5.3%
|
|
| 2009 | 4 |
21.1%
|
|
| 2010 | 2 |
10.5%
|
|
| 2011 | 4 |
21.1%
|
|
| 2012 | 4 |
21.1%
|
|
| Sysmiss | 1706 |