| Value | Category | Cases | |
|---|---|---|---|
| 1968 | 2 |
5.9%
|
|
| 1978 | 1 |
2.9%
|
|
| 1979 | 1 |
2.9%
|
|
| 1980 | 1 |
2.9%
|
|
| 1982 | 1 |
2.9%
|
|
| 1984 | 1 |
2.9%
|
|
| 1985 | 2 |
5.9%
|
|
| 1991 | 1 |
2.9%
|
|
| 1993 | 1 |
2.9%
|
|
| 1995 | 1 |
2.9%
|
|
| 2000 | 1 |
2.9%
|
|
| 2002 | 1 |
2.9%
|
|
| 2003 | 1 |
2.9%
|
|
| 2004 | 1 |
2.9%
|
|
| 2005 | 2 |
5.9%
|
|
| 2006 | 1 |
2.9%
|
|
| 2007 | 2 |
5.9%
|
|
| 2008 | 2 |
5.9%
|
|
| 2009 | 1 |
2.9%
|
|
| 2012 | 3 |
8.8%
|
|
| 2013 | 1 |
2.9%
|
|
| 2015 | 1 |
2.9%
|
|
| 2016 | 1 |
2.9%
|
|
| 2017 | 1 |
2.9%
|
|
| 3333 | Missing | 0 |
0%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 3 |
8.8%
|
| Sysmiss | 965 |