| Value | Category | Cases | |
|---|---|---|---|
| 1973 | 1 |
1.8%
|
|
| 1975 | 1 |
1.8%
|
|
| 1976 | 1 |
1.8%
|
|
| 1980 | 1 |
1.8%
|
|
| 1986 | 1 |
1.8%
|
|
| 1995 | 1 |
1.8%
|
|
| 2000 | 1 |
1.8%
|
|
| 2007 | 1 |
1.8%
|
|
| 2008 | 2 |
3.5%
|
|
| 2010 | 1 |
1.8%
|
|
| 2012 | 4 |
7%
|
|
| 2015 | 12 |
21.1%
|
|
| 2016 | 19 |
33.3%
|
|
| 2017 | 11 |
19.3%
|
|
| Sysmiss | 5301 |