| Value | Category | Cases | |
|---|---|---|---|
| 1985 | 1 |
1.1%
|
|
| 2005 | 1 |
1.1%
|
|
| 2009 | 1 |
1.1%
|
|
| 2011 | 1 |
1.1%
|
|
| 2012 | 2 |
2.2%
|
|
| 2013 | 4 |
4.3%
|
|
| 2014 | 2 |
2.2%
|
|
| 2015 | 6 |
6.5%
|
|
| 2016 | 14 |
15.1%
|
|
| 2017 | 10 |
10.8%
|
|
| 2018 | 33 |
35.5%
|
|
| 2019 | 16 |
17.2%
|
|
| Missing value | 2 |
2.2%
|