I had some time so i did some research. TG govt did samgra kutumba survey in 2015 with caste info. though they havent released population of each caste (KCR cunningly uses it for electioneering - he realized for example Gollas and mudiraj are high in number for his sheep distribution and fish distribution )they released aggregate numbers here  https://data.telangana.gov.in/dataset/integrated-household-survey I downloaded and played with data . Here are unbelievable stats: a) OC po