In one decade, the population increased from 427,045 in 1991 to 671,805 in 2001. The population was projected to reach 915,071 in 2011 and 1,319,597 by 2021. To keep up this population growth, the KMC-controlled area of  expanded to  in 2001. With this new area, the population density which was 85 in 1991 remained 85 in 2001; it is likely to jump to 111 in 2011 and 161 in 2021.