| Value | Category | Cases | |
|---|---|---|---|
| 1986 | 1 |
0%
|
|
| 1987 | 2 |
0.1%
|
|
| 1990 | 3 |
0.1%
|
|
| 1991 | 28 |
0.8%
|
|
| 1992 | 4 |
0.1%
|
|
| 1993 | 6 |
0.2%
|
|
| 1995 | 1 |
0%
|
|
| 1996 | 6 |
0.2%
|
|
| 1997 | 37 |
1%
|
|
| 1998 | 2 |
0.1%
|
|
| 2000 | 16 |
0.4%
|
|
| 2001 | 14 |
0.4%
|
|
| 2002 | 10 |
0.3%
|
|
| 2003 | 10 |
0.3%
|
|
| 2004 | 20 |
0.6%
|
|
| 2005 | 10 |
0.3%
|
|
| 2006 | 5 |
0.1%
|
|
| 2007 | 25 |
0.7%
|
|
| 2008 | 45 |
1.2%
|
|
| 2009 | 197 |
5.4%
|
|
| 2010 | 163 |
4.5%
|
|
| 2011 | 933 |
25.8%
|
|
| 2012 | 395 |
10.9%
|
|
| 2013 | 189 |
5.2%
|
|
| 2014 | 471 |
13%
|
|
| 2015 | 484 |
13.4%
|
|
| 2016 | 262 |
7.2%
|
|
| 2017 | 283 |
7.8%
|