Kerala is the state with the lowest positive population growth rate in India (3.44%) and has a density of 860 people per km2. The state has the highest Human Development Index (HDI) (0.790) in the country according to the Human Development Report 2011. It also has the highest literacy rate 93.91%, the highest life expectancy (almost 77 years) and the highest sex ratio (as defined by number of women per 1000 men: 1,084 women per 1000 men) among all Indian states. Kerala has the lowest homicide rate among Indian states, for 2011 it was 1.1 per 100,000. A survey in 2005 by Transparency International ranked it as the least corrupt state in the country.