| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 2 |
0.1%
|
|
| 1981 | 1 |
0%
|
|
| 1982 | 1 |
0%
|
|
| 1983 | 6 |
0.2%
|
|
| 1984 | 9 |
0.3%
|
|
| 1985 | 8 |
0.3%
|
|
| 1986 | 14 |
0.5%
|
|
| 1987 | 17 |
0.6%
|
|
| 1988 | 22 |
0.7%
|
|
| 1989 | 32 |
1.1%
|
|
| 1990 | 24 |
0.8%
|
|
| 1991 | 33 |
1.1%
|
|
| 1992 | 41 |
1.4%
|
|
| 1993 | 70 |
2.3%
|
|
| 1994 | 51 |
1.7%
|
|
| 1995 | 66 |
2.2%
|
|
| 1996 | 50 |
1.7%
|
|
| 1997 | 85 |
2.8%
|
|
| 1998 | 98 |
3.3%
|
|
| 1999 | 86 |
2.9%
|
|
| 2000 | 112 |
3.7%
|
|
| 2001 | 83 |
2.8%
|
|
| 2002 | 108 |
3.6%
|
|
| 2003 | 127 |
4.2%
|
|
| 2004 | 121 |
4%
|
|
| 2005 | 158 |
5.3%
|
|
| 2006 | 126 |
4.2%
|
|
| 2007 | 143 |
4.8%
|
|
| 2008 | 152 |
5.1%
|
|
| 2009 | 165 |
5.5%
|
|
| 2010 | 180 |
6%
|
|
| 2011 | 165 |
5.5%
|
|
| 2012 | 154 |
5.1%
|
|
| 2013 | 182 |
6.1%
|
|
| 2014 | 185 |
6.2%
|
|
| 2015 | 119 |
4%
|
|
| 2016 | 4 |
0.1%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 9915 |