The living standard of Keralites is very high when compared to the national level. With a population of about 30 million, the state is India's most progressed society in terms of education, literacy and health. In fact, Kerala has the highest Physical Quality of Life Index (PQLI) in India and the highest Human Development Index. With highest literacy rate in country, highest life expectancy, least population growth, lowest infant mortality, Kerala, not surprisingly, has been adopted by the world bodies as a role model for developing countries.