| Value | Category | Cases | |
|---|---|---|---|
| 1975 | 1 |
0.2%
|
|
| 1982 | 1 |
0.2%
|
|
| 1983 | 1 |
0.2%
|
|
| 1985 | 1 |
0.2%
|
|
| 1986 | 1 |
0.2%
|
|
| 1990 | 1 |
0.2%
|
|
| 1991 | 1 |
0.2%
|
|
| 1994 | 1 |
0.2%
|
|
| 1995 | 4 |
1%
|
|
| 1996 | 1 |
0.2%
|
|
| 1997 | 1 |
0.2%
|
|
| 1998 | 2 |
0.5%
|
|
| 1999 | 1 |
0.2%
|
|
| 2000 | 6 |
1.5%
|
|
| 2001 | 4 |
1%
|
|
| 2002 | 5 |
1.2%
|
|
| 2003 | 4 |
1%
|
|
| 2004 | 2 |
0.5%
|
|
| 2005 | 22 |
5.3%
|
|
| 2006 | 10 |
2.4%
|
|
| 2007 | 12 |
2.9%
|
|
| 2008 | 13 |
3.1%
|
|
| 2009 | 7 |
1.7%
|
|
| 2010 | 30 |
7.3%
|
|
| 2011 | 33 |
8%
|
|
| 2012 | 40 |
9.7%
|
|
| 2013 | 47 |
11.4%
|
|
| 2014 | 88 |
21.3%
|
|
| 2015 | 60 |
14.5%
|
|
| 2016 | 6 |
1.5%
|
|
| 9998 | don't know/don't remember | 7 |
1.7%
|
| Sysmiss | 12502 |