Your methodology is absurd. There is a good analysis of precisely this folly in the introduction to the World Population Prospects: The 2015 Revision. I suggest you read this report and study its methodology. Canadian population growth will be dependent on immigration so is really a political question. A reasonable estimate of the number of people of Muslim origin is about 18%, depending a lot on immigration policy and patterns, could be as high as 30% but that seems unlikely. How many of these will be practicing Muslims. None of us have any idea but I would be surprised if it is more than half, a population of 9-15% of practicing Muslims.