| Value | Category | Cases | |
|---|---|---|---|
| 1988 | 1 |
0%
|
|
| 1990 | 1 |
0%
|
|
| 1991 | 12 |
0.1%
|
|
| 1992 | 9 |
0.1%
|
|
| 1993 | 14 |
0.2%
|
|
| 1994 | 17 |
0.2%
|
|
| 1995 | 27 |
0.3%
|
|
| 1996 | 34 |
0.4%
|
|
| 1997 | 25 |
0.3%
|
|
| 1998 | 44 |
0.5%
|
|
| 1999 | 24 |
0.3%
|
|
| 2000 | 69 |
0.8%
|
|
| 2001 | 35 |
0.4%
|
|
| 2002 | 39 |
0.5%
|
|
| 2003 | 78 |
0.9%
|
|
| 2004 | 52 |
0.6%
|
|
| 2005 | 69 |
0.8%
|
|
| 2006 | 60 |
0.7%
|
|
| 2007 | 62 |
0.7%
|
|
| 2008 | 147 |
1.7%
|
|
| 2009 | 73 |
0.9%
|
|
| 2010 | 125 |
1.5%
|
|
| 2011 | 71 |
0.8%
|
|
| 2012 | 89 |
1%
|
|
| 2013 | 68 |
0.8%
|
|
| 2014 | 93 |
1.1%
|
|
| 2015 | 134 |
1.6%
|
|
| 2016 | 128 |
1.5%
|
|
| 2017 | 117 |
1.4%
|
|
| 2018 | 106 |
1.2%
|
|
| 9998 | DK | 175 |
2.1%
|
| 9999 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 6512 |
76.5%
|