| Value | Category | Cases | |
|---|---|---|---|
| 1966 | 1 |
0.1%
|
|
| 1970 | 1 |
0.1%
|
|
| 1973 | 2 |
0.1%
|
|
| 1975 | 2 |
0.1%
|
|
| 1976 | 2 |
0.1%
|
|
| 1977 | 2 |
0.1%
|
|
| 1978 | 1 |
0.1%
|
|
| 1979 | 5 |
0.3%
|
|
| 1980 | 1 |
0.1%
|
|
| 1982 | 2 |
0.1%
|
|
| 1983 | 1 |
0.1%
|
|
| 1984 | 2 |
0.1%
|
|
| 1985 | 6 |
0.3%
|
|
| 1986 | 4 |
0.2%
|
|
| 1987 | 3 |
0.2%
|
|
| 1988 | 3 |
0.2%
|
|
| 1989 | 5 |
0.3%
|
|
| 1990 | 11 |
0.6%
|
|
| 1991 | 2 |
0.1%
|
|
| 1992 | 1 |
0.1%
|
|
| 1993 | 4 |
0.2%
|
|
| 1994 | 8 |
0.4%
|
|
| 1995 | 5 |
0.3%
|
|
| 1996 | 5 |
0.3%
|
|
| 1997 | 1 |
0.1%
|
|
| 1998 | 6 |
0.3%
|
|
| 1999 | 19 |
1%
|
|
| 2000 | 24 |
1.3%
|
|
| 2001 | 3 |
0.2%
|
|
| 2002 | 10 |
0.5%
|
|
| 2003 | 10 |
0.5%
|
|
| 2004 | 8 |
0.4%
|
|
| 2005 | 23 |
1.2%
|
|
| 2006 | 13 |
0.7%
|
|
| 2007 | 17 |
0.9%
|
|
| 2008 | 21 |
1.1%
|
|
| 2009 | 29 |
1.6%
|
|
| 2010 | 56 |
3%
|
|
| 2011 | 44 |
2.4%
|
|
| 2012 | 100 |
5.4%
|
|
| 2013 | 198 |
10.6%
|
|
| 2014 | 712 |
38.1%
|
|
| 2015 | 348 |
18.6%
|
|
| 3333 | Missing | 0 |
0%
|
| 5555 | Not Applicable | 1 |
0.1%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 147 |
7.9%
|
| Sysmiss | 24935 |