| Level | Score | Percent (%) | Interpretation |
| 1 | 0 - 11 | 0 - 19 | Very poor |
| 2 | 12 - 23 | 20 - 39 | Weak |
| 3 | 24 - 35 | 40 - 49 | Moderate |
| 4 | 36 - 47 | 50 - 69 | Good |
| 5 | 48 - 57 | 79 - 100 | Excellent |