| Value | Category | Cases | |
|---|---|---|---|
| 98 | Don't know | 0 |
0%
|
| 1996 | 1 |
0.2%
|
|
| 1997 | 2 |
0.4%
|
|
| 1998 | 8 |
1.5%
|
|
| 1999 | 6 |
1.1%
|
|
| 2000 | 6 |
1.1%
|
|
| 2001 | 13 |
2.4%
|
|
| 2002 | 11 |
2.1%
|
|
| 2003 | 17 |
3.2%
|
|
| 2004 | 18 |
3.4%
|
|
| 2005 | 15 |
2.8%
|
|
| 2006 | 25 |
4.7%
|
|
| 2007 | 33 |
6.2%
|
|
| 2008 | 50 |
9.4%
|
|
| 2009 | 66 |
12.4%
|
|
| 2010 | 87 |
16.4%
|
|
| 2011 | 86 |
16.2%
|
|
| 2012 | 83 |
15.6%
|
|
| 9998 | Don't know | 4 |
0.8%
|
| Sysmiss | 1179 |