| Value | Category | Cases | |
|---|---|---|---|
| 1980 | 1 |
0%
|
|
| 1981 | 1 |
0%
|
|
| 1983 | 3 |
0%
|
|
| 1984 | 5 |
0.1%
|
|
| 1985 | 9 |
0.1%
|
|
| 1986 | 19 |
0.2%
|
|
| 1987 | 41 |
0.5%
|
|
| 1988 | 76 |
0.9%
|
|
| 1989 | 98 |
1.2%
|
|
| 1990 | 146 |
1.7%
|
|
| 1991 | 155 |
1.8%
|
|
| 1992 | 140 |
1.6%
|
|
| 1993 | 153 |
1.8%
|
|
| 1994 | 144 |
1.7%
|
|
| 1995 | 162 |
1.9%
|
|
| 1996 | 141 |
1.7%
|
|
| 1997 | 129 |
1.5%
|
|
| 1998 | 144 |
1.7%
|
|
| 1999 | 150 |
1.8%
|
|
| 2000 | 198 |
2.3%
|
|
| 2001 | 140 |
1.6%
|
|
| 2002 | 159 |
1.9%
|
|
| 2003 | 166 |
2%
|
|
| 2004 | 190 |
2.2%
|
|
| 2005 | 210 |
2.5%
|
|
| 2006 | 202 |
2.4%
|
|
| 2007 | 236 |
2.8%
|
|
| 2008 | 298 |
3.5%
|
|
| 2009 | 269 |
3.2%
|
|
| 2010 | 248 |
2.9%
|
|
| 2011 | 214 |
2.5%
|
|
| 2012 | 239 |
2.8%
|
|
| 2013 | 237 |
2.8%
|
|
| 2014 | 221 |
2.6%
|
|
| 2015 | 190 |
2.2%
|
|
| 2016 | 159 |
1.9%
|
|
| 2017 | 128 |
1.5%
|
|
| 2018 | 86 |
1%
|
|
| 9998 | DK | 75 |
0.9%
|
| 9999 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 2927 |
34.4%
|