Curious about the economic situation of the Singaporeans of Indian origin

Hi,
I am an Indian from India, and I am curious about the economic behavior of the Indians living outside India.

Recently I have started to read about the history of Singapore, and I found that Indian-origin people have been living there for many years.

Therefore, I would like to know how they are doing economically compared to others.
How are their academic performances?

From the internet, what I came to know is that Indian-origin Singaporeans are mostly interested in service-based sectors. How true is this?