There is no accurate data of castes in India since 1931. Because the last caste-based census was done in 1931. In 1990, when 27% reservation was given to the backward castes by implementing the recommendations of the BP Mandal Commission, then its basis was also the figures of the 1931 census. Now various parties are demanding to conduct caste census on this basis. But the Central Government has already refused in the Parliament on the caste census. View video.