The population figure of SCs in relation to the total population figure had increased from 14.6% in the 1971 census to 16.2% in the 2001 census. Similarly, the population figure of STs had increased from 6.9% in the 1971 census to 8.2% in the 2001 census. The overall increase in the population of SCs and STs in the 2001 census has led the Delimitation Commission to increase the seats for Scheduled castes in Lok Sabha from 79 to 84 and for Scheduled Tribes from 41 to 47 out of 543 constituencies, as per the Delimitation of Parliamentary and Assembly Constituencies Order of 2008.