Where are all the Asians?

It depends where they immigrate to. You have to look at history and how africans, hispanics etc. came into America. Here in Australia we used to have a White Australian Policy that did not let any other race than the English to come into Australia. Until that ban was lifted, many different races were allowed to come into the country. There are quite a number of Asians that live in Australia now. And gradually we are allowing more and more people to come in. Recently it was the Sudanese. So yeah depends on the immigration policies and history.