| Value | Category | Cases | |
|---|---|---|---|
| 1 | 2000 to 2004 | 899 |
45.5%
|
| 2 | 2005 to 2009 | 475 |
24.1%
|
| 3 | 2010 to 2014 | 359 |
18.2%
|
| 4 | 2015 to 2018 | 241 |
12.2%
|
| Sysmiss | 1028 |