| Value | Category | Cases | |
|---|---|---|---|
| 99 | Mising | 0 |
0%
|
| 1988 | 4 |
11.8%
|
|
| 1990 | 2 |
5.9%
|
|
| 1991 | 4 |
11.8%
|
|
| 1992 | 3 |
8.8%
|
|
| 1994 | 1 |
2.9%
|
|
| 1995 | 2 |
5.9%
|
|
| 1997 | 2 |
5.9%
|
|
| 1999 | 1 |
2.9%
|
|
| 2000 | 2 |
5.9%
|
|
| 2001 | 3 |
8.8%
|
|
| 2002 | 1 |
2.9%
|
|
| 2004 | 1 |
2.9%
|
|
| 2006 | 2 |
5.9%
|
|
| 2007 | 1 |
2.9%
|
|
| 2008 | 2 |
5.9%
|
|
| 2009 | 1 |
2.9%
|
|
| 2010 | 1 |
2.9%
|
|
| 2012 | 1 |
2.9%
|
|
| Sysmiss | 1691 |