Before revision:  The indicators that we use are derived from the Census 2011 The Ministry of Home Affairs, Government of India, 2011 and the NFHS-4 The Ministry of Health and Family Welfare, Government of India, 2016 survey data.
After revision:  The The Ministry of Home Affairs, Government of India, 2011 and the NFHS-4 The Ministry of Health and Family Welfare, Government of India, 2016 survey data.