| Value | Category | Cases | |
|---|---|---|---|
| 1978 | 1 |
2.7%
|
|
| 1996 | 2 |
5.4%
|
|
| 1999 | 1 |
2.7%
|
|
| 2000 | 4 |
10.8%
|
|
| 2003 | 2 |
5.4%
|
|
| 2005 | 1 |
2.7%
|
|
| 2006 | 2 |
5.4%
|
|
| 2007 | 1 |
2.7%
|
|
| 2008 | 1 |
2.7%
|
|
| 2010 | 1 |
2.7%
|
|
| 2012 | 1 |
2.7%
|
|
| 2013 | 3 |
8.1%
|
|
| 2015 | 7 |
18.9%
|
|
| 2016 | 2 |
5.4%
|
|
| 2017 | 1 |
2.7%
|
|
| 2018 | 1 |
2.7%
|
|
| 2019 | 2 |
5.4%
|
|
| 2020 | 3 |
8.1%
|
|
| 2021 | 1 |
2.7%
|