| Value | Category | Cases | |
|---|---|---|---|
| 1987 | 2 |
0.1%
|
|
| 1988 | 3 |
0.1%
|
|
| 1989 | 1 |
0%
|
|
| 1990 | 1 |
0%
|
|
| 1991 | 3 |
0.1%
|
|
| 1992 | 1 |
0%
|
|
| 1993 | 6 |
0.2%
|
|
| 1994 | 10 |
0.4%
|
|
| 1995 | 10 |
0.4%
|
|
| 1996 | 15 |
0.6%
|
|
| 1997 | 22 |
0.9%
|
|
| 1998 | 23 |
0.9%
|
|
| 1999 | 41 |
1.6%
|
|
| 2000 | 32 |
1.3%
|
|
| 2001 | 34 |
1.3%
|
|
| 2002 | 61 |
2.4%
|
|
| 2003 | 63 |
2.5%
|
|
| 2004 | 68 |
2.7%
|
|
| 2005 | 97 |
3.8%
|
|
| 2006 | 90 |
3.5%
|
|
| 2007 | 131 |
5.2%
|
|
| 2008 | 149 |
5.9%
|
|
| 2009 | 215 |
8.5%
|
|
| 2010 | 303 |
11.9%
|
|
| 2011 | 240 |
9.4%
|
|
| 2012 | 270 |
10.6%
|
|
| 2013 | 255 |
10%
|
|
| 2014 | 233 |
9.2%
|
|
| 2015 | 129 |
5.1%
|
|
| 2016 | 1 |
0%
|
|
| 9998 | don't know | 33 |
1.3%
|
| Sysmiss | 9217 |