| Value | Category | Cases | |
|---|---|---|---|
| 1986 | 2 |
0%
|
|
| 1987 | 3 |
0.1%
|
|
| 1988 | 4 |
0.1%
|
|
| 1989 | 12 |
0.2%
|
|
| 1990 | 9 |
0.2%
|
|
| 1991 | 20 |
0.4%
|
|
| 1992 | 27 |
0.5%
|
|
| 1993 | 44 |
0.8%
|
|
| 1994 | 51 |
0.9%
|
|
| 1995 | 75 |
1.4%
|
|
| 1996 | 92 |
1.7%
|
|
| 1997 | 89 |
1.6%
|
|
| 1998 | 136 |
2.5%
|
|
| 1999 | 119 |
2.2%
|
|
| 2000 | 168 |
3.1%
|
|
| 2001 | 180 |
3.3%
|
|
| 2002 | 166 |
3%
|
|
| 2003 | 200 |
3.6%
|
|
| 2004 | 219 |
4%
|
|
| 2005 | 214 |
3.9%
|
|
| 2006 | 249 |
4.5%
|
|
| 2007 | 231 |
4.2%
|
|
| 2008 | 266 |
4.8%
|
|
| 2009 | 238 |
4.3%
|
|
| 2010 | 288 |
5.2%
|
|
| 2011 | 289 |
5.2%
|
|
| 2012 | 288 |
5.2%
|
|
| 2013 | 269 |
4.9%
|
|
| 2014 | 289 |
5.2%
|
|
| 2015 | 285 |
5.2%
|
|
| 2016 | 264 |
4.8%
|
|
| 2017 | 285 |
5.2%
|
|
| 2018 | 210 |
3.8%
|
|
| 2019 | 223 |
4%
|
|
| 9999 | NO RESPONSE | 3 |
0.1%
|