That is hard to quantify in any objective way for two reasons. The first is that, if they are still permanent residents, they are eligible for the settlement services and programs offered in the community even if they change provinces. However, if they change provinces and have become Canadian citizens or naturalized citizens, they are no longer eligible for those services. They still need support and assistance to integrate more fully because the provinces are not all the same and the realities are not identical, but unfortunately they do not receive those services as a result of the eligibility criteria. So that does not provide a clear idea of the rate or number of interprovincial migrants.
On October 6th, 2016. See this statement in context.