Guwahati is one of the most rapidly growing cities in India. The city's population grew from just two-hundred thousand in 1971 to more than five-hundred thousand in 1991, and in the census of 2001 the city's population was found to be 8,09,895. By 2011, it is estimated that Guwahati will boast more than a million residents as the growth rate of the city follows geometric pattern. In 2001, males constituted 55 percent and females at 45 percent of Guwahati's residents. That is as compared to the overall sex ratio of Assam which is 932 Guwahati has sex ratio 839 which is a bit lower. It was found that 10 percent of the population is less than 6 years of age. Guwahati has an average literacy rate of 78 percent, with male literacy at 81 and female literacy at 74 percent. So Guwahti is the largest urban city of Assam with 24% urban population of the state.