| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 1 |
5.9%
|
|
| 1997 | 2 |
11.8%
|
|
| 2000 | 1 |
5.9%
|
|
| 2002 | 1 |
5.9%
|
|
| 2003 | 1 |
5.9%
|
|
| 2005 | 1 |
5.9%
|
|
| 2006 | 1 |
5.9%
|
|
| 2007 | 1 |
5.9%
|
|
| 2011 | 1 |
5.9%
|
|
| 2012 | 4 |
23.5%
|
|
| 2013 | 2 |
11.8%
|
|
| 2015 | 1 |
5.9%
|
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 12898 |