| Value | Category | Cases | |
|---|---|---|---|
| 1988 | 9 |
0.2%
|
|
| 1990 | 11 |
0.2%
|
|
| 1991 | 31 |
0.7%
|
|
| 1992 | 11 |
0.2%
|
|
| 1993 | 18 |
0.4%
|
|
| 1994 | 66 |
1.4%
|
|
| 1995 | 55 |
1.2%
|
|
| 1996 | 22 |
0.5%
|
|
| 1997 | 63 |
1.4%
|
|
| 1998 | 118 |
2.5%
|
|
| 1999 | 99 |
2.1%
|
|
| 2000 | 160 |
3.4%
|
|
| 2001 | 118 |
2.5%
|
|
| 2002 | 97 |
2.1%
|
|
| 2003 | 133 |
2.9%
|
|
| 2004 | 144 |
3.1%
|
|
| 2005 | 120 |
2.6%
|
|
| 2006 | 122 |
2.6%
|
|
| 2007 | 200 |
4.3%
|
|
| 2008 | 193 |
4.2%
|
|
| 2009 | 213 |
4.6%
|
|
| 2010 | 305 |
6.6%
|
|
| 2011 | 185 |
4%
|
|
| 2012 | 317 |
6.8%
|
|
| 2013 | 302 |
6.5%
|
|
| 2014 | 236 |
5.1%
|
|
| 2015 | 299 |
6.4%
|
|
| 2016 | 298 |
6.4%
|
|
| 2017 | 337 |
7.3%
|
|
| 2018 | 358 |
7.7%
|
|
| 9997 | inconsistent | 0 |
0%
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 30970 |