"The nearly 1.9 million Indian immigrants living in the United States in 2011 represented the third-largest immigrant group by country of origin, behind Mexico and China. The share of Indian immigrants among all foreign born in the United States grew from less than 0.5 percent in 1960 to almost 5 percent in 2011.
[snip]
This article reports on a wide range of characteristics of Indian immigrants residing in the United States, including the population's size, geographic distribution, admission categories, and demographic and socioeconomic characteristics. Data are from the US Census Bureau's 2011 American Community Survey (ACS), the 2000 Decennial Census (as well as earlier censuses), and the Department of Homeland Security's (DHS) Office of Immigration Statistics (OIS) (2012 data)."
[snip]
This article reports on a wide range of characteristics of Indian immigrants residing in the United States, including the population's size, geographic distribution, admission categories, and demographic and socioeconomic characteristics. Data are from the US Census Bureau's 2011 American Community Survey (ACS), the 2000 Decennial Census (as well as earlier censuses), and the Department of Homeland Security's (DHS) Office of Immigration Statistics (OIS) (2012 data)."
For the rest, read this article, Indian Immigrants in the United States, by Monica Whatley and Jeanne Batalova of the Migration Policy Institute