At the 2011 Census of India, the population of the state of Tamil Nadu was 72,147,039, increasing from 62.4 million in 2001. There were 36,137,975 males and 36,009,064 females, with a sex ratio of 996 females per 1000 males. Its literacy rate was 80.09%. 10.51% of the population was below seven years old, and it had a population density of 555.