| Value | Category | Cases | |
|---|---|---|---|
| 1966 | 1 |
0.5%
|
|
| 1973 | 1 |
0.5%
|
|
| 1974 | 1 |
0.5%
|
|
| 1977 | 1 |
0.5%
|
|
| 1980 | 2 |
0.9%
|
|
| 1982 | 1 |
0.5%
|
|
| 1984 | 1 |
0.5%
|
|
| 1986 | 3 |
1.4%
|
|
| 1987 | 2 |
0.9%
|
|
| 1988 | 1 |
0.5%
|
|
| 1989 | 1 |
0.5%
|
|
| 1990 | 1 |
0.5%
|
|
| 1991 | 3 |
1.4%
|
|
| 1994 | 3 |
1.4%
|
|
| 1997 | 2 |
0.9%
|
|
| 1998 | 2 |
0.9%
|
|
| 1999 | 2 |
0.9%
|
|
| 2000 | 4 |
1.9%
|
|
| 2001 | 4 |
1.9%
|
|
| 2002 | 5 |
2.4%
|
|
| 2003 | 1 |
0.5%
|
|
| 2004 | 2 |
0.9%
|
|
| 2005 | 4 |
1.9%
|
|
| 2006 | 2 |
0.9%
|
|
| 2007 | 2 |
0.9%
|
|
| 2008 | 6 |
2.8%
|
|
| 2009 | 8 |
3.8%
|
|
| 2010 | 3 |
1.4%
|
|
| 2011 | 1 |
0.5%
|
|
| 2012 | 5 |
2.4%
|
|
| 2013 | 6 |
2.8%
|
|
| 3333 | Missing | 1 |
0.5%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 1 |
0.5%
|
| 9999 | Don't know | 129 |
60.8%
|
| Sysmiss | 26592 |