other surveyed cities. About 18% of the men and 30% of the women in Kolkata are obese—the majority of them belonging to the non-poor strata of society. In 2005, Kolkata had the highest percentage (55%) among the surveyed cities of anaemic women, while 20% of the men in Kolkata were anaemic. Diseases like diabetes, asthma, goitre and other thyroid disorders were found in large numbers of people. Tropical diseases like malaria, dengue and chikungunya are prevalent in Kolkata, though their incidence is decreasing. Kolkata is one of the districts in India with a high number of people with AIDS; it has been designated a district prone to high risk. As of 2014, because of higher air pollution, the life expectancy of a person born in the city is four years fewer than in the suburbs. Education Kolkata's schools are run by the state government or private organisations, many of which are religious. Bengali and English are the primary languages of instruction; Urdu and Hindi are also used, particularly in central Kolkata. Schools in Kolkata follow the "10+2+3" plan. After completing their secondary education, students typically enroll in schools that have a higher secondary facility and are affiliated with the West Bengal Council of Higher Secondary Education, the ICSE, or the CBSE. They usually choose a focus on liberal arts, business, or science. Vocational programs are also available. Some Kolkata schools, for example South Point School, La Martiniere Calcutta, Calcutta Boys' School, St. James' School (Kolkata), St. Xavier's Collegiate School and Loreto House, have been ranked amongst the best schools in the country. , the Kolkata urban agglomeration is home to 14 universities run by the state government. The colleges are each affiliated with a university or institution based either in Kolkata or elsewhere in India. Aliah University which was founded in 1780 as Mohammedan College of Calcutta is the oldest post-secondary educational institution of the city. The University of Calcutta, founded in 1857, is the first modern university in South Asia. Presidency College, Kolkata (formerly Hindu College between 1817 and 1855), founded in 1855, was one of the oldest colleges in India. It was affiliated with the University of Calcutta until 2010 when it was converted to Presidency University, Kolkata in 2010. Bengal Engineering and Science University (BESU) is the second oldest engineering institution of the country located in Howrah. An Institute of National Importance, BESU was converted to India's