However , according to National Sample Survey 's 1999 -- 2000 round around 36 per cent of the country 's population is defined as belonging to the Other Backward Classes ( OBC ) .
There is nocoss data on OBCs in the census .
According to National Sample Survey 's 1999 -- 2000 round around 36 per cent of the country 's population is defined as belonging to the OBCs     ( OBCs ) .
There is nocoss data on OBCs in the census .