| Share of Inequality (%) | ||||||
| Year | Between-region | Within-region | East region | Central region | West region | Northeast region |
| 2000 | 9.15 | 90.85 | 23.87 | 16.33 | 50.66 | 0.01 |
| 2001 | 10.24 | 89.76 | 23.19 | 13.10 | 53.41 | 0.04 |
| 2002 | 11.69 | 88.31 | 26.60 | 12.28 | 49.04 | 0.39 |
| 2003 | 22.58 | 77.42 | 31.86 | 15.88 | 28.76 | 0.96 |
| 2004 | 20.08 | 79.92 | 36.33 | 16.72 | 25.85 | 1.02 |
| 2005 | 20.17 | 79.83 | 38.15 | 20.64 | 20.56 | 0.54 |
| 2006 | 21.69 | 78.31 | 37.01 | 21.99 | 18.80 | 0.47 |
| 2007 | 21.29 | 78.71 | 34.10 | 23.37 | 20.86 | 0.37 |
| 2008 | 21.81 | 78.19 | 33.62 | 25.75 | 18.20 | 0.61 |
| 2009 | 21.97 | 78.03 | 29.32 | 24.90 | 23.08 | 0.67 |
| 2010 | 23.45 | 76.55 | 29.12 | 21.75 | 24.47 | 1.22 |
| 2011 | 24.08 | 75.92 | 22.25 | 20.86 | 31.17 | 1.60 |
| 2012 | 30.01 | 69.99 | 22.02 | 18.47 | 28.81 | 0.68 |
| 2013 | 33.31 | 66.69 | 18.52 | 18.62 | 29.33 | 0.19 |
| 2014 | 38.82 | 61.18 | 15.32 | 17.13 | 28.56 | 0.18 |
| 2015 | 44.53 | 55.47 | 14.41 | 15.05 | 25.71 | 0.26 |
| 2016 | 53.00 | 47.00 | 16.84 | 5.18 | 26.76 | 0.23 |
| Average | 25.17 | 74.83 | 26.62 | 18.12 | 29.65 | 0.56 |