| Value | Category | Cases | |
|---|---|---|---|
| 1975 | 1 |
0.6%
|
|
| 1980 | 1 |
0.6%
|
|
| 1985 | 1 |
0.6%
|
|
| 1992 | 2 |
1.2%
|
|
| 1994 | 2 |
1.2%
|
|
| 1995 | 3 |
1.7%
|
|
| 1996 | 2 |
1.2%
|
|
| 1998 | 2 |
1.2%
|
|
| 2000 | 6 |
3.5%
|
|
| 2001 | 2 |
1.2%
|
|
| 2002 | 3 |
1.7%
|
|
| 2003 | 4 |
2.3%
|
|
| 2004 | 4 |
2.3%
|
|
| 2005 | 2 |
1.2%
|
|
| 2006 | 5 |
2.9%
|
|
| 2007 | 4 |
2.3%
|
|
| 2008 | 16 |
9.3%
|
|
| 2009 | 4 |
2.3%
|
|
| 2010 | 2 |
1.2%
|
|
| 2011 | 4 |
2.3%
|
|
| 2012 | 7 |
4.1%
|
|
| 2013 | 5 |
2.9%
|
|
| 2014 | 10 |
5.8%
|
|
| 2015 | 18 |
10.5%
|
|
| 2016 | 19 |
11%
|
|
| 2017 | 34 |
19.8%
|
|
| 2018 | 9 |
5.2%
|
|
| Sysmiss | 2466 |