We've published lots of research on migration and mobility patterns. For the last 40 years there's been net movement from urban areas back to reserves. The reserves themselves are quite stable. The first nation population on reserve has the lowest mobility rate of any group in Canada. The highest mobility rates, though, are the actual populations in urban centres. Most of the mobility is occurring within cities and between cities.
The movement between reserves and cities exists, but the net amount has been consistent for the last 40 years back to reserves. This leaves one to try to understand the push-pull factors that make reserves more preferable to live in than cities. We have done some analysis of the reasons people move. We get that not from the census but from the Aboriginal Peoples Survey. There's a variety of patterns. Twenty-five percent of the people, for instance, who leave reserves are looking for better housing. But 25% of the people going back to reserves are looking for better housing on-reserve. There's a housing problem off-reserve as well for aboriginal populations in this country.
Another reason people leave reserves is for education and employment. There's a variety of push-pull factors that make the situation very complex.
Back to your question about diminishing crowding, it's not only a function of the population, it's also a function of the supply of housing itself. So one would have to look at the supply side over that time period as well to assess that pattern.
We've done work for the Community Well-Being Index, in which crowding is one component. That data goes back to 1981. We looked at the patterns over time. Again, it's a function of both the supply and demand sides, which makes it a bit more challenging in terms of that particular analysis.