| قيمة | فئة | حالات | |
|---|---|---|---|
| 1993 | 9 |
1%
|
|
| 1997 | 9 |
1%
|
|
| 1999 | 15 |
1.7%
|
|
| 2000 | 15 |
1.7%
|
|
| 2001 | 15 |
1.7%
|
|
| 2003 | 10 |
1.1%
|
|
| 2004 | 6 |
0.7%
|
|
| 2005 | 20 |
2.2%
|
|
| 2006 | 32 |
3.6%
|
|
| 2007 | 41 |
4.6%
|
|
| 2008 | 24 |
2.7%
|
|
| 2009 | 75 |
8.4%
|
|
| 2010 | 76 |
8.5%
|
|
| 2011 | 52 |
5.8%
|
|
| 2012 | 88 |
9.8%
|
|
| 2013 | 94 |
10.5%
|
|
| 2014 | 119 |
13.3%
|
|
| 2015 | 163 |
18.2%
|
|
| 9998 | Don't know | 33 |
3.7%
|
| Sysmiss | 58594 |