It's not a matter of what the percentage "should" be, it's a matter of why it was so low. I think you already knew that though, and thus your rather ridiculous question.
As I said, I agree that it party accounts for it, but not fully. As I said, there are other reasons as well. What percentage of Canada's population is suppose to be black?
Racism against Blacks in Canada has existed at both the individual and institutional level has been reflected in restrictive immigration policies and practices against nonwhite immigrants(10). The Black population in Canada did not grow to a substantial number until the 1960's when changes in the Immigration Act removed a bias against nonwhite immigrants and permitted large numbers of West Indians and Africans to enter Canada. Between 1950 and 1995 there were abut 300,000 immigrants from the West Indies and over 150,000 from Africa, including people of Asian and European descent(11)
It was the civil rights movement of the 1950s and 1960s, led by Martin Luther King Jr., that encouraged the passage of civil rights legislation prohibiting discrimination for reason of colour, race, religion or national origin in the United States. The American civil rights movement bolstered Black Canadians' self-confidence and pride in themselves that led greater social inclusion and opportunity(12). Over the past twenty-five years in particular, provincial and federal governments have implemented multicultural and human rights legislation and policies(13). Link
Do you think it was merely coincidence that the Black population grew in Canada at the same time there were changes in Canada's racist immigration policy?