| Value | Category | Cases | |
|---|---|---|---|
| 1960 | 1 |
1.5%
|
|
| 1963 | 1 |
1.5%
|
|
| 1966 | 1 |
1.5%
|
|
| 1970 | 1 |
1.5%
|
|
| 1973 | 1 |
1.5%
|
|
| 1974 | 1 |
1.5%
|
|
| 1977 | 2 |
2.9%
|
|
| 1978 | 1 |
1.5%
|
|
| 1980 | 1 |
1.5%
|
|
| 1981 | 1 |
1.5%
|
|
| 1982 | 2 |
2.9%
|
|
| 1989 | 1 |
1.5%
|
|
| 1990 | 1 |
1.5%
|
|
| 1991 | 1 |
1.5%
|
|
| 1992 | 1 |
1.5%
|
|
| 2000 | 1 |
1.5%
|
|
| 2006 | 1 |
1.5%
|
|
| 2007 | 1 |
1.5%
|
|
| 2008 | 6 |
8.8%
|
|
| 2009 | 2 |
2.9%
|
|
| 2010 | 3 |
4.4%
|
|
| 2011 | 2 |
2.9%
|
|
| 2012 | 2 |
2.9%
|
|
| 3333 | Missing | 1 |
1.5%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 32 |
47.1%
|
| Sysmiss | 22398 |