Table: state_literacy
Columns: state
literacy_rate_2013_estimate
literacy_rate_2001_census
literacy_rate_2011_census
increase

Question: What was the literacy rate published in the 2001 census for the state that saw a 12.66% increase?
SQL: SELECT "literacy_rate_2001_census" FROM state_literacy WHERE "increase" = '12.66%'

Question: What is the average estimated 2013 literacy rate for the states that had a literacy rate of 68.81% in the 2001 census and a literacy rate higher than 79.6% in the 2011 census?
SQL: SELECT "literacy_rate_2013_estimate" FROM state_literacy WHERE "literacy_rate_2011_census" > 79.6 AND "literacy_rate_2001_census" = 68.81

Question: What is the average increase in literacy for the states that had a rate higher than 73.2% in 2011, less than 68.81% in 2001, and an estimate of 76.8% for 2013?
SQL: SELECT "increase" FROM state_literacy WHERE "literacy_rate_2011_census" > 73.2 AND "literacy_rate_2001_census" < 68.81 AND "literacy_rate_2013_estimate" = 76.8