| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2009 or before | 59 |
14.5%
|
| 2 | 2010 to 2014 | 202 |
49.8%
|
| 3 | 2015 to 2019 | 145 |
35.7%
|
| Sysmiss | 84 |