measles and full courses of polio and DPT), fewer than in all other surveyed cities except Meerut. The infant mortality rate was 35 per 1,000 live births, and the mortality rate for children under five was 41 per 1,000 live births. The survey also reported that a third of women and a quarter of men are overweight or obese, 49% of children below 5 years are anaemic, and up to 20% of children are underweight, while more than 2% of women and 3% of men suffer from diabetes. Demographics When the GHMC was created in 2007, the area occupied by the municipality increased from to . Consequently, the population increased by 87%, from 3,637,483 census to 6,809,970 census, 24% of which are migrants from elsewhere in India, making Hyderabad the nation's fourth most populous city. , the population density is and the Hyderabad urban agglomeration had a population of 7,749,334 making it the sixth most populous urban agglomeration in the country. census, there are 3,500,802 male and 3,309,168 female citizens—a sex ratio of 945 females per 1000 males, higher than the national average of 926 per 1000. Among children aged years, 373,794 are boys and 352,022 are girls—a ratio of 942 per 1000. Literacy stands at 83% (male 86%; female 80%), higher than the national average of 74.04%. The socio-economic strata consist of 20% upper class, 50% middle class and 30% working class. Ethnicity Referred to as "Hyderabadi", the residents of Hyderabad are predominantly Telugu and Urdu speaking people, with minority Bengali, Sindhi, Kannada, Memon, Nawayathi, Malayalam, Marathi, Gujarati, Marwari, Odia, Punjabi, Tamil and Uttar Pradeshi communities. Hyderabadi Muslims are a unique community who owe much of their history, language, cuisine, and culture to Hyderabad, and the various dynasties who previously ruled. Hadhrami Arabs, African Arabs, Armenians, Abyssinians, Iranians, Pathans and Turkish people are also present; these communities, of which the Hadhrami Arabs or Chaush are the largest, declined after Hyderabad State became part of the Indian Union, as they lost the patronage of the Asaf Jahi Nizams. Religion Hindus are in the majority. Muslims form a very large minority, and are present throughout the city and predominate in and around old Hyderabad. There are also Christian, Sikh, Jain, Buddhist and Parsi communities and iconic churches, mosques and temples. census, the religious make-up of Greater Hyderabad was: Hindus (64.9%), Muslims (30.1%), Christians (2.8%), Jains (0.3%), Sikhs (0.3%) and Buddhists (0.1%);