It's hard to say which countries benefit from our study permit application refusals precisely because we don't have a clear and accurate picture of the reasons why students are refused. It's very hard for us to get information on the various stages of the process from the moment students decide to consider coming to Canada to study at the post-secondary level until they disappear off our radar screens. We don't know why they aren't accepted. We don't know why delays occur. So we need more clarity. It would be easier to answer your excellent question if we had better cooperation with IRCC.
On March 1st, 2022. See this statement in context.