| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 4 |
1.6%
|
|
| 2009 | 9 |
3.5%
|
|
| 2010 | 25 |
9.7%
|
|
| 2011 | 120 |
46.5%
|
|
| 2012 | 17 |
6.6%
|
|
| 9998 | don't know | 10 |
3.9%
|
| 9999 | never visit household | 73 |
28.3%
|
| Sysmiss | 48928 |