| Value | Category | Cases | |
|---|---|---|---|
| 1987 | 1 |
0.1%
|
|
| 1988 | 1 |
0.1%
|
|
| 1989 | 4 |
0.3%
|
|
| 1990 | 3 |
0.2%
|
|
| 1991 | 11 |
0.7%
|
|
| 1992 | 21 |
1.4%
|
|
| 1993 | 10 |
0.7%
|
|
| 1994 | 15 |
1%
|
|
| 1995 | 27 |
1.8%
|
|
| 1996 | 31 |
2.1%
|
|
| 1997 | 17 |
1.1%
|
|
| 1998 | 25 |
1.7%
|
|
| 1999 | 23 |
1.5%
|
|
| 2000 | 32 |
2.1%
|
|
| 2001 | 44 |
2.9%
|
|
| 2002 | 36 |
2.4%
|
|
| 2003 | 47 |
3.1%
|
|
| 2004 | 22 |
1.5%
|
|
| 2005 | 52 |
3.5%
|
|
| 2006 | 25 |
1.7%
|
|
| 2007 | 36 |
2.4%
|
|
| 2008 | 33 |
2.2%
|
|
| 2009 | 70 |
4.7%
|
|
| 2010 | 75 |
5%
|
|
| 2011 | 70 |
4.7%
|
|
| 2012 | 65 |
4.3%
|
|
| 2013 | 81 |
5.4%
|
|
| 2014 | 99 |
6.6%
|
|
| 2015 | 108 |
7.2%
|
|
| 2016 | 110 |
7.3%
|
|
| 2017 | 138 |
9.2%
|
|
| 2018 | 143 |
9.5%
|
|
| 2019 | 15 |
1%
|
|
| 9999 | NO RESPONSE | 5 |
0.3%
|
| Sysmiss | 5 |
0.3%
|