| Value | Category | Cases | |
|---|---|---|---|
| -3 | 1 |
0.1%
|
|
| 1968 | 1 |
0.1%
|
|
| 1970 | 1 |
0.1%
|
|
| 1980 | 1 |
0.1%
|
|
| 1981 | 1 |
0.1%
|
|
| 1983 | 1 |
0.1%
|
|
| 1985 | 1 |
0.1%
|
|
| 1987 | 2 |
0.2%
|
|
| 1989 | 1 |
0.1%
|
|
| 1992 | 1 |
0.1%
|
|
| 1993 | 2 |
0.2%
|
|
| 1994 | 2 |
0.2%
|
|
| 1995 | 6 |
0.5%
|
|
| 1996 | 3 |
0.3%
|
|
| 1997 | 4 |
0.3%
|
|
| 1998 | 7 |
0.6%
|
|
| 1999 | 13 |
1.1%
|
|
| 2000 | 12 |
1%
|
|
| 2001 | 5 |
0.4%
|
|
| 2002 | 11 |
0.9%
|
|
| 2003 | 6 |
0.5%
|
|
| 2004 | 17 |
1.4%
|
|
| 2005 | 23 |
1.9%
|
|
| 2006 | 25 |
2.1%
|
|
| 2007 | 22 |
1.9%
|
|
| 2008 | 84 |
7.1%
|
|
| 2009 | 196 |
16.5%
|
|
| 2010 | 666 |
56.2%
|
|
| 2011 | 8 |
0.7%
|
|
| 2222 | Not asked in Phase 2 | 0 |
0%
|
| 3333 | Missing | 18 |
1.5%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 44 |
3.7%
|
| Sysmiss | 20689 |