No.
We cannot either quote statistics of how many of those who were deported or sent back home or went back home have been in fact detained or tortured or killed. I don't think anyone has access to or has compiled that type of information. Perhaps you could ask Amnesty International, but I don't think that anyone at the table has this information.
In regard to what you were mentioning about the risk review before deportation, the number of people who are in fact found at risk after having been denied refugee status is very low. The criteria that Immigration Canada is using to assess those cases are very strict, and a very small number of people are finally accepted in Canada and can stay at the end of that process. Most of them will in fact be deported.