alot of hood dudes, single mothers, black families who lived in metro housing when they saved and got a little coin, pickering ajax, whitby, oshawa, brampton were the cheapest places to buy houses so that's where they went.
Its

that out of every city in canada ajax in terms of percentage has the most black people
ajax is still one of the only places in the "gta" you can get a hosue like
http://www.remax.ca/on/ajax-real-estate/na-8-mullord-ave-treb_e2968829-lst
for under 800
but its getting expensive as well now as most houses are over half a mill