| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1993 | 4 |
1.1%
|
| 2 | 1998 | 1 |
0.3%
|
| 3 | 2000 | 1 |
0.3%
|
| 4 | 2001 | 1 |
0.3%
|
| 5 | 2004 | 3 |
0.9%
|
| 6 | 2005 | 6 |
1.7%
|
| 7 | 2007 | 2 |
0.6%
|
| 8 | 2010 | 3 |
0.9%
|
| 9 | 2011 | 224 |
64.4%
|
| 10 | 2012 | 28 |
8%
|
| 11 | 2013 | 22 |
6.3%
|
| 12 | 2014 | 15 |
4.3%
|
| 13 | 2015 | 10 |
2.9%
|
| 14 | 2016 | 14 |
4%
|
| 15 | 2017 | 2 |
0.6%
|
| 16 | 2018 | 5 |
1.4%
|
| 17 | 2019 | 1 |
0.3%
|
| Missing value | 6 |
1.7%
|