| Value | Category | Cases | |
|---|---|---|---|
| 1975 | 1 |
0%
|
|
| 1976 | 1 |
0%
|
|
| 1978 | 1 |
0%
|
|
| 1979 | 1 |
0%
|
|
| 1985 | 1 |
0%
|
|
| 1992 | 1 |
0%
|
|
| 1999 | 2 |
0.1%
|
|
| 2000 | 4 |
0.2%
|
|
| 2001 | 5 |
0.2%
|
|
| 2002 | 4 |
0.2%
|
|
| 2003 | 11 |
0.5%
|
|
| 2004 | 22 |
0.9%
|
|
| 2005 | 29 |
1.2%
|
|
| 2006 | 32 |
1.4%
|
|
| 2007 | 49 |
2.1%
|
|
| 2008 | 54 |
2.3%
|
|
| 2009 | 43 |
1.8%
|
|
| 2010 | 80 |
3.4%
|
|
| 2011 | 69 |
2.9%
|
|
| 2012 | 10 |
0.4%
|
|
| 9998 | don't know | 4 |
0.2%
|
| 9999 | not applicable | 1827 |
77.4%
|
| 9999995 | missing:impute | 110 |
4.7%
|
| Sysmiss | 9 |