| Value | Category | Cases | |
|---|---|---|---|
| 1975 | 1 |
2.3%
|
|
| 1986 | 1 |
2.3%
|
|
| 1990 | 1 |
2.3%
|
|
| 1995 | 1 |
2.3%
|
|
| 2000 | 1 |
2.3%
|
|
| 2002 | 2 |
4.7%
|
|
| 2004 | 1 |
2.3%
|
|
| 2007 | 1 |
2.3%
|
|
| 2009 | 1 |
2.3%
|
|
| 2014 | 2 |
4.7%
|
|
| 2015 | 7 |
16.3%
|
|
| 2016 | 15 |
34.9%
|
|
| 2017 | 9 |
20.9%
|
|
| Sysmiss | 5315 |