| Legend |
| Significantly below average |
1 |
band e - significant deterioration at 5% level (value <= -1.96) |
| Below average |
2 |
band d - significant deterioration at 10% level (value <= -1.64 and > - 1.96) |
| Average |
3 |
band c - no significant improvement or deterioration (value < +1.64 and > - 1.64) |
| Above average |
4 |
band b - signficant improvement at 10% level (value >= 1.64 and < 1.96) |
| Significantly above average |
5 |
band a - significant improvement at 5% level (value >= 1.96) |
