I just found this on a Canadian site talking about interracial marriages, and some of the information surprised me. For example,
"The Japanese are most likely to enter a mixed union, the census showed, at 74.7 per cent. The second and third groups most likely to be involved in an interracial relationship are Latin Americans (47 per cent) and blacks (40.6 per cent).
In contrast, South Asians and Chinese are among the least likely to form a union outside their group."
Here is the link to the page.
http://lifewise.canoe.ca/SexRomance/2008/04/04/5193156-cp.html