| Value | Category | Cases | |
|---|---|---|---|
| 1985 | 1 |
0.9%
|
|
| 2002 | 1 |
0.9%
|
|
| 2013 | 2 |
1.8%
|
|
| 2014 | 1 |
0.9%
|
|
| 2015 | 4 |
3.7%
|
|
| 2016 | 2 |
1.8%
|
|
| 2017 | 2 |
1.8%
|
|
| 9999 | 96 |
88.1%
|
|
| Sysmiss | 6 |