| Value | Category | Cases | |
|---|---|---|---|
| 1979 | 1 |
0.1%
|
|
| 1984 | 1 |
0.1%
|
|
| 1987 | 1 |
0.1%
|
|
| 1988 | 2 |
0.3%
|
|
| 1990 | 1 |
0.1%
|
|
| 1993 | 1 |
0.1%
|
|
| 1994 | 1 |
0.1%
|
|
| 1995 | 2 |
0.3%
|
|
| 1996 | 2 |
0.3%
|
|
| 1997 | 2 |
0.3%
|
|
| 1999 | 1 |
0.1%
|
|
| 2000 | 6 |
0.8%
|
|
| 2002 | 3 |
0.4%
|
|
| 2005 | 4 |
0.5%
|
|
| 2006 | 2 |
0.3%
|
|
| 2008 | 2 |
0.3%
|
|
| 2009 | 4 |
0.5%
|
|
| 2010 | 15 |
2%
|
|
| 2011 | 6 |
0.8%
|
|
| 2012 | 17 |
2.2%
|
|
| 2013 | 142 |
18.7%
|
|
| 2014 | 107 |
14.1%
|
|
| 2015 | 52 |
6.9%
|
|
| 2016 | 54 |
7.1%
|
|
| 2017 | 65 |
8.6%
|
|
| 2018 | 89 |
11.7%
|
|
| 2019 | 176 |
23.2%
|
|
| Sysmiss | 1122 |