| Value | Category | Cases | |
|---|---|---|---|
| 1983 | 1 |
0.1%
|
|
| 1984 | 3 |
0.2%
|
|
| 1985 | 3 |
0.2%
|
|
| 1986 | 3 |
0.2%
|
|
| 1987 | 8 |
0.5%
|
|
| 1988 | 13 |
0.8%
|
|
| 1989 | 19 |
1.1%
|
|
| 1990 | 12 |
0.7%
|
|
| 1991 | 26 |
1.5%
|
|
| 1992 | 18 |
1%
|
|
| 1993 | 21 |
1.2%
|
|
| 1994 | 24 |
1.4%
|
|
| 1995 | 29 |
1.7%
|
|
| 1996 | 18 |
1%
|
|
| 1997 | 28 |
1.6%
|
|
| 1998 | 31 |
1.8%
|
|
| 1999 | 52 |
3%
|
|
| 2000 | 43 |
2.5%
|
|
| 2001 | 23 |
1.3%
|
|
| 2002 | 24 |
1.4%
|
|
| 2003 | 17 |
1%
|
|
| 2004 | 26 |
1.5%
|
|
| 2005 | 31 |
1.8%
|
|
| 2006 | 27 |
1.6%
|
|
| 2007 | 24 |
1.4%
|
|
| 2008 | 30 |
1.7%
|
|
| 2009 | 42 |
2.4%
|
|
| 2010 | 55 |
3.2%
|
|
| 2011 | 32 |
1.9%
|
|
| 2012 | 27 |
1.6%
|
|
| 2013 | 33 |
1.9%
|
|
| 2014 | 41 |
2.4%
|
|
| 2015 | 35 |
2%
|
|
| 2016 | 35 |
2%
|
|
| 2017 | 43 |
2.5%
|
|
| 2018 | 27 |
1.6%
|
|
| 2019 | 35 |
2%
|
|
| 2020 | 3 |
0.2%
|
|
| 9997 | INCONSISTENT | 3 |
0.2%
|
| 9998 | DK | 91 |
5.3%
|
| 9999 | NO RESPONSE | 9 |
0.5%
|
| Sysmiss | 656 |
38.1%
|