| Year | Population | Marginal increase | Percentage increase |
| 1976 | 57,000 | - | - |
| 1987 | 210,797 | 205,097 | 97.29 |
| 1997 | 376,000 | 165,203 | 43.93 |
| 2005 | 538,449 | 162,449 | 30.16 |
| 2017 | 800,000 | 261,551 | 32.69 |