| Value | Category | Cases | |
|---|---|---|---|
| 98 | 4 |
0.2%
|
|
| 1964 | 1 |
0%
|
|
| 1985 | 2 |
0.1%
|
|
| 1991 | 1 |
0%
|
|
| 1992 | 1 |
0%
|
|
| 1993 | 1 |
0%
|
|
| 1995 | 1 |
0%
|
|
| 1996 | 2 |
0.1%
|
|
| 1997 | 1 |
0%
|
|
| 1998 | 4 |
0.2%
|
|
| 1999 | 3 |
0.1%
|
|
| 2000 | 5 |
0.2%
|
|
| 2001 | 3 |
0.1%
|
|
| 2002 | 9 |
0.4%
|
|
| 2003 | 23 |
0.9%
|
|
| 2004 | 41 |
1.6%
|
|
| 2005 | 135 |
5.3%
|
|
| 2006 | 1110 |
43.5%
|
|
| 2007 | 332 |
13%
|
|
| 2008 | 2 |
0.1%
|
|
| 8888 | never | 847 |
33.2%
|
| 9995 | missing | 0 |
0%
|
| 9997 | refused | 0 |
0%
|
| 9998 | don’t know | 25 |
1%
|
| 9999 | missing | 0 |
0%
|
| Sysmiss | 3338 |