| Value | Category | Cases | |
|---|---|---|---|
| 98 | Don't know | 0 |
0%
|
| 998 | Don't know | 0 |
0%
|
| 1997 | 1 |
0.7%
|
|
| 1999 | 3 |
2.2%
|
|
| 2000 | 7 |
5.1%
|
|
| 2001 | 5 |
3.6%
|
|
| 2002 | 3 |
2.2%
|
|
| 2003 | 3 |
2.2%
|
|
| 2004 | 8 |
5.8%
|
|
| 2005 | 7 |
5.1%
|
|
| 2006 | 9 |
6.6%
|
|
| 2007 | 13 |
9.5%
|
|
| 2008 | 13 |
9.5%
|
|
| 2009 | 16 |
11.7%
|
|
| 2010 | 11 |
8%
|
|
| 2011 | 18 |
13.1%
|
|
| 2012 | 19 |
13.9%
|
|
| 9998 | Don't know | 1 |
0.7%
|
| Sysmiss | 1402 |