| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 61 |
29.5%
|
|
| 2003 | 121 |
58.5%
|
|
| 7777 | NZ | 0 |
0%
|
| 8888 | BO | 25 |
12.1%
|
| Sysmiss | 9522 |