| Value | Category | Cases | |
|---|---|---|---|
| 99 | Mising | 0 |
0%
|
| 1980 | 3 |
14.3%
|
|
| 1988 | 3 |
14.3%
|
|
| 1993 | 1 |
4.8%
|
|
| 1994 | 1 |
4.8%
|
|
| 1995 | 1 |
4.8%
|
|
| 2004 | 1 |
4.8%
|
|
| 2006 | 1 |
4.8%
|
|
| 2009 | 1 |
4.8%
|
|
| 2010 | 2 |
9.5%
|
|
| 2011 | 4 |
19%
|
|
| 2012 | 3 |
14.3%
|
|
| Sysmiss | 1704 |