Passage: The district has a population density of 717 inhabitants per square kilometre (1,860/sq mi) . Its population growth rate over the decade 2001-2011 was  12.77%. Etah has a sex ratio of 863 females for every 1000 males, and a literacy rate of 73.27%.

Question: What was the rate of population expansion of the district from 2001-2011?
12.77%