| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very effective | 2039 |
42.3%
|
| 2 | Fairly effective | 1793 |
37.2%
|
| 3 | Fairly ineffective | 579 |
12%
|
| 4 | Very ineffective | 414 |
8.6%
|
| Sysmiss | 4650 |