| RSEI Level | 2008 | 2013 | 2017 | |||
| Area (km2) | Percent (%) | Area (km2) | Percent (%) | Area (km2) | Percent (%) | |
| Poor (0.0 - 0.2) | 57.73 | 0.11 | 337.28 | 0.63 | 17.94 | 0.03 |
| Inferior (0.2 - 0.4) | 22.05 | 0.04 | 1271.74 | 2.38 | 1221.78 | 2.28 |
| Medium (0.4 - 0.6) | 775.50 | 1.45 | 0.00 | 0.00 | 0.00 | 0.00 |
| Good (0.6 - 0.8) | 26519.22 | 49.58 | 5764.38 | 10.78 | 6010.91 | 11.24 |
| Excellent (0.8 - 0.1) | 26113.50 | 48.82 | 46114.61 | 86.21 | 46237.38 | 86.45 |
| Total | 53488.01 | 100 | 53488.01 | 100 | 53488.01 | 100 |