| Value | Category | Cases | |
|---|---|---|---|
| 1990 | 1 |
0.4%
|
|
| 1991 | 1 |
0.4%
|
|
| 1994 | 1 |
0.4%
|
|
| 1995 | 2 |
0.8%
|
|
| 1999 | 1 |
0.4%
|
|
| 2000 | 1 |
0.4%
|
|
| 2001 | 2 |
0.8%
|
|
| 2002 | 4 |
1.6%
|
|
| 2003 | 3 |
1.2%
|
|
| 2004 | 6 |
2.4%
|
|
| 2005 | 6 |
2.4%
|
|
| 2006 | 16 |
6.5%
|
|
| 2007 | 12 |
4.9%
|
|
| 2008 | 18 |
7.3%
|
|
| 2009 | 15 |
6.1%
|
|
| 2010 | 26 |
10.6%
|
|
| 2011 | 26 |
10.6%
|
|
| 2012 | 40 |
16.3%
|
|
| 2013 | 52 |
21.2%
|
|
| 2014 | 12 |
4.9%
|
|
| Sysmiss | .don't know | 0 | |
| Sysmiss | .qre refused | 0 | |
| Sysmiss | .refusal | 0 | |
| Sysmiss | .skip | 0 | |
| Sysmiss | .x. censored | 0 | |
| Sysmiss | 1189 |