The slums in Delhi, as in other urban centres, are clusters of dwellings of poor migrant workers and their families who come to the city to earn a living. In 1982, before the Asian Games, the government brought in 10 lakh (1 million) workers into the city for development and beautification projects. In the following years, migration has been on the rise owing to lack of sources of livelihood in rural areas. While the first master plan for Delhi (made in 1962) included space within the city for the poor, in recent decades, rising real estate prices and changing attitudes and policies of the ruling classes meant that the slum dweller became increasingly vulnerable. While his/her services were still required, his/her right to living space and basic resources was questioned. From 2000-2006, aided by court orders, around 350 slums, many that had been in existence for decades, were demolished in the name of making the city clean and more developed. Meanwhile, the rehabilitation procedure was made so complicated that roughly two thirds of the families were left homeless, the others being given plots in locations very far from their sources of livelihood. A survey done by the Ministry of Housing and Poverty Alleviation in 2011 says that one in five persons living in Delhi is a slum dweller. There are 3,133 slums in the city, 1,058 of them registered, with 31.63 lakh (3.16 million) people living in them.