Ceci est ma Vie

Rediff reports that Delhi has the most crorepatis in India. The figures are based upon the National Council of Applied Economic Research's forthcoming 'The Great Indian Middle Class' which is based on a sample of over 3,00,000 households and is a part of NCAER's annual household survey.
They have defined crorepati households as those having an annual income of Rs 1 crore [USD 220,000]. So Delhi it seems has 5,085 super-rich households [which comes to roughly 1 in 500] and Mumbai has 4,439 [1 in 800].
Interestingly, Nagpur shows the fastest growth in this elite group and has 425 super-rich households.
The whole study looks pretty interesting and it would be fun to delve into other parts of it, also into other classes of income as well.