| Value | Category | Cases | |
|---|---|---|---|
| 2001 | 100 |
16.3%
|
|
| 2002 | 495 |
80.5%
|
|
| 7777 | NZ | 0 |
0%
|
| 8888 | BO | 20 |
3.3%
|
| Sysmiss | 6915 |