We're not projecting here; we're looking backwards. They are taken into consideration. We do measure interprovincial migration, and the population estimates reflect everything we know about interprovincial migration. For example, one of the techniques we employ is to take different generations of the tax files, find somebody in one file, and then see where they were in the next taxation year. Have they moved? That information is used to help us estimate interprovincial migration.
In fact, the estimates that are currently available do reflect the best information we have on interprovincial migrations, which are usually a result of economic considerations.