| Value | Category | Cases | |
|---|---|---|---|
| 2013 | 2013 or earlier | 972 |
20.6%
|
| 2014 | 787 |
16.7%
|
|
| 2015 | 537 |
11.4%
|
|
| 2016 | 1497 |
31.8%
|
|
| 2017 | 2017 or later | 918 |
19.5%
|
| Sysmiss | 549 |