Lets see.
According to
http://www.aapiusa.org/aapi/index.aspx Number of Physicians of Indian Origin is around 41000. And According to
http://www.usatoday.com/news/health/...shortage_x.htm Total number of Medical Doctors are around 800000. SO Basic Math says the around 19% of octors are of Indian origin. That means the Doctors who are born and brought up in USA is also included.
So one more proof again. Indians like to play with statistics to make it look favourable for them. As for the other stats I would refrain myself from finding more simply because its not worth it.
I would say one more thing IBM have one of the biggest office in the town I reside. Trust me total number of Indian workers is much much less than that. Cause IBM policy is not to hire people without US Permenant residency. Most of the people of Indian or any other origin works there works through consultency firms.