| Value | Category | Cases | |
|---|---|---|---|
| 1969 | 1 |
0.5%
|
|
| 1976 | 1 |
0.5%
|
|
| 1984 | 1 |
0.5%
|
|
| 1985 | 3 |
1.5%
|
|
| 1989 | 1 |
0.5%
|
|
| 1991 | 1 |
0.5%
|
|
| 1993 | 1 |
0.5%
|
|
| 1994 | 1 |
0.5%
|
|
| 1996 | 2 |
1%
|
|
| 1997 | 1 |
0.5%
|
|
| 1998 | 3 |
1.5%
|
|
| 1999 | 1 |
0.5%
|
|
| 2000 | 6 |
2.9%
|
|
| 2001 | 10 |
4.9%
|
|
| 2002 | 4 |
2%
|
|
| 2003 | 8 |
3.9%
|
|
| 2004 | 5 |
2.4%
|
|
| 2005 | 8 |
3.9%
|
|
| 2006 | 10 |
4.9%
|
|
| 2007 | 10 |
4.9%
|
|
| 2008 | 20 |
9.8%
|
|
| 2009 | 18 |
8.8%
|
|
| 2010 | 21 |
10.2%
|
|
| 2011 | 31 |
15.1%
|
|
| 2012 | 14 |
6.8%
|
|
| 3333 | Missing | 0 |
0%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 23 |
11.2%
|
| Sysmiss | 22261 |