| Value | Category | Cases | |
|---|---|---|---|
| 1983 | 1 |
0%
|
|
| 1986 | 4 |
0.1%
|
|
| 1987 | 11 |
0.2%
|
|
| 1988 | 30 |
0.5%
|
|
| 1989 | 47 |
0.8%
|
|
| 1990 | 78 |
1.4%
|
|
| 1991 | 62 |
1.1%
|
|
| 1992 | 99 |
1.7%
|
|
| 1993 | 95 |
1.6%
|
|
| 1994 | 97 |
1.7%
|
|
| 1995 | 123 |
2.1%
|
|
| 1996 | 106 |
1.8%
|
|
| 1997 | 102 |
1.8%
|
|
| 1998 | 102 |
1.8%
|
|
| 1999 | 117 |
2%
|
|
| 2000 | 118 |
2%
|
|
| 2001 | 117 |
2%
|
|
| 2002 | 136 |
2.4%
|
|
| 2003 | 134 |
2.3%
|
|
| 2004 | 113 |
2%
|
|
| 2005 | 178 |
3.1%
|
|
| 2006 | 198 |
3.4%
|
|
| 2007 | 218 |
3.8%
|
|
| 2008 | 211 |
3.7%
|
|
| 2009 | 228 |
4%
|
|
| 2010 | 231 |
4%
|
|
| 2011 | 237 |
4.1%
|
|
| 2012 | 252 |
4.4%
|
|
| 2013 | 273 |
4.7%
|
|
| 2014 | 290 |
5%
|
|
| 2015 | 284 |
4.9%
|
|
| 2016 | 233 |
4%
|
|
| 2017 | 184 |
3.2%
|
|
| 2018 | 129 |
2.2%
|
|
| 2019 | 9 |
0.2%
|
|
| 9997 | INCONSISTENT | 1 |
0%
|
| 9998 | DK | 12 |
0.2%
|
| 9999 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 899 |
15.6%
|