| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 | 3 |
2.8%
|
| 2 | 1988 | 1 |
0.9%
|
| 3 | 1994 | 1 |
0.9%
|
| 4 | 1996 | 1 |
0.9%
|
| 5 | 1999 | 3 |
2.8%
|
| 6 | 2000 | 2 |
1.9%
|
| 7 | 2002 | 4 |
3.7%
|
| 8 | 2003 | 1 |
0.9%
|
| 9 | 2004 | 1 |
0.9%
|
| 10 | 2005 | 1 |
0.9%
|
| 11 | 2006 | 2 |
1.9%
|
| 12 | 2007 | 4 |
3.7%
|
| 13 | 2008 | 10 |
9.3%
|
| 14 | 2009 | 5 |
4.7%
|
| 15 | 2010 | 9 |
8.4%
|
| 16 | 2011 | 1 |
0.9%
|
| 17 | 2012 | 3 |
2.8%
|
| 18 | 2013 | 2 |
1.9%
|
| 19 | 2014 | 5 |
4.7%
|
| 20 | 2015 | 6 |
5.6%
|
| 21 | 2016 | 4 |
3.7%
|
| 22 | 2017 | 13 |
12.1%
|
| 23 | 2018 | 2 |
1.9%
|
| 24 | 2019 | 3 |
2.8%
|
| 25 | 2020 | 6 |
5.6%
|
| 26 | 2021 | 4 |
3.7%
|
| Sysmiss | 10 |