| Value | Category | Cases | |
|---|---|---|---|
| 1981 | 1 |
0.5%
|
|
| 1986 | 1 |
0.5%
|
|
| 1990 | 3 |
1.6%
|
|
| 1991 | 1 |
0.5%
|
|
| 1992 | 3 |
1.6%
|
|
| 1993 | 1 |
0.5%
|
|
| 1994 | 5 |
2.6%
|
|
| 1995 | 1 |
0.5%
|
|
| 1996 | 2 |
1%
|
|
| 1997 | 3 |
1.6%
|
|
| 2000 | 9 |
4.7%
|
|
| 2001 | 2 |
1%
|
|
| 2002 | 2 |
1%
|
|
| 2003 | 2 |
1%
|
|
| 2004 | 8 |
4.1%
|
|
| 2005 | 4 |
2.1%
|
|
| 2006 | 5 |
2.6%
|
|
| 2007 | 12 |
6.2%
|
|
| 2008 | 10 |
5.2%
|
|
| 2009 | 9 |
4.7%
|
|
| 2010 | 24 |
12.4%
|
|
| 2011 | 11 |
5.7%
|
|
| 2012 | 22 |
11.4%
|
|
| 2013 | 46 |
23.8%
|
|
| 2014 | 6 |
3.1%
|
|
| Sysmiss | .don't know | 0 | |
| Sysmiss | .qre refused | 0 | |
| Sysmiss | .refusal | 0 | |
| Sysmiss | .skip | 0 | |
| Sysmiss | .x. censored | 0 | |
| Sysmiss | 1241 |