Indian Muslims in the US

Why are there so few Muslims from India in the US?

According to a recent news report, there are more Muslims from Pakistan - which itself has fewer Muslims than India*. This is a bit surprising, when we believe that the Indian educational system trains well, and that there are equal opportunities for everyone.

Is it that Muslims are not using their opportunities in India? Or, that they are not choosing to come to the US?

Or, is the number misleading; in other words, is the percent of Muslims in the Indian immigrant population in the US roughly the same as the percent of Muslims in India (16.4)? If this is the case, then immigration from Pakistan must be higher than that from India - as a percent of its own population.

Any other explanations?

* Total population of Pakistan in 2007 - 169M (of this, 96% are muslims)
Number of Muslims in India in 2001 - 174M