| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 9 |
0.6%
|
|
| 1982 | 15 |
0.9%
|
|
| 1983 | 6 |
0.4%
|
|
| 1985 | 12 |
0.7%
|
|
| 1986 | 5 |
0.3%
|
|
| 1987 | 10 |
0.6%
|
|
| 1988 | 16 |
1%
|
|
| 1989 | 21 |
1.3%
|
|
| 1990 | 25 |
1.6%
|
|
| 1991 | 9 |
0.6%
|
|
| 1993 | 15 |
0.9%
|
|
| 1994 | 27 |
1.7%
|
|
| 1995 | 27 |
1.7%
|
|
| 1996 | 52 |
3.2%
|
|
| 1997 | 52 |
3.2%
|
|
| 1998 | 73 |
4.6%
|
|
| 1999 | 57 |
3.6%
|
|
| 2000 | 108 |
6.7%
|
|
| 2001 | 37 |
2.3%
|
|
| 2002 | 104 |
6.5%
|
|
| 2003 | 77 |
4.8%
|
|
| 2004 | 116 |
7.2%
|
|
| 2005 | 96 |
6%
|
|
| 2006 | 135 |
8.4%
|
|
| 2007 | 131 |
8.2%
|
|
| 2008 | 128 |
8%
|
|
| 2009 | 118 |
7.4%
|
|
| 2010 | 103 |
6.4%
|
|
| 9998 | Don't know | 12 |
0.7%
|
| 9999 | Missing | 7 |
0.4%
|
| Sysmiss | 28963 |