| Value | Category | Cases | |
|---|---|---|---|
| 1950 | 1 |
0.3%
|
|
| 1960 | 1 |
0.3%
|
|
| 1962 | 1 |
0.3%
|
|
| 1976 | 1 |
0.3%
|
|
| 1979 | 2 |
0.6%
|
|
| 1981 | 1 |
0.3%
|
|
| 1982 | 1 |
0.3%
|
|
| 1984 | 2 |
0.6%
|
|
| 1985 | 4 |
1.2%
|
|
| 1986 | 3 |
0.9%
|
|
| 1987 | 5 |
1.5%
|
|
| 1988 | 1 |
0.3%
|
|
| 1989 | 3 |
0.9%
|
|
| 1990 | 5 |
1.5%
|
|
| 1991 | 1 |
0.3%
|
|
| 1992 | 5 |
1.5%
|
|
| 1993 | 4 |
1.2%
|
|
| 1994 | 1 |
0.3%
|
|
| 1995 | 3 |
0.9%
|
|
| 1996 | 4 |
1.2%
|
|
| 1997 | 5 |
1.5%
|
|
| 1998 | 5 |
1.5%
|
|
| 1999 | 6 |
1.8%
|
|
| 2000 | 10 |
3%
|
|
| 2001 | 4 |
1.2%
|
|
| 2002 | 4 |
1.2%
|
|
| 2003 | 3 |
0.9%
|
|
| 2004 | 8 |
2.4%
|
|
| 2005 | 10 |
3%
|
|
| 2006 | 4 |
1.2%
|
|
| 2007 | 5 |
1.5%
|
|
| 2008 | 14 |
4.3%
|
|
| 2009 | 12 |
3.7%
|
|
| 2010 | 11 |
3.4%
|
|
| 2011 | 12 |
3.7%
|
|
| 2012 | 12 |
3.7%
|
|
| 2013 | 6 |
1.8%
|
|
| 2014 | 21 |
6.4%
|
|
| 2015 | 30 |
9.1%
|
|
| 2016 | 29 |
8.8%
|
|
| 2017 | 24 |
7.3%
|
|
| 3333 | Missing | 0 |
0%
|
| 5555 | Not applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 44 |
13.4%
|
| Sysmiss | 671 |