| Value | Category | Cases | |
|---|---|---|---|
| 1988 | 2 |
0.3%
|
|
| 2011 | 5 |
0.6%
|
|
| 2012 | 39 |
5%
|
|
| 2013 | 62 |
8%
|
|
| 2014 | 183 |
23.6%
|
|
| 2015 | 169 |
21.8%
|
|
| 2016 | 116 |
14.9%
|
|
| 2017 | 79 |
10.2%
|
|
| 2018 | 29 |
3.7%
|
|
| 2019 | 20 |
2.6%
|
|
| 2020 | 6 |
0.8%
|
|
| 2021 | 4 |
0.5%
|
|
| 2022 | 2 |
0.3%
|
|
| Missing value | 60 |
7.7%
|