That link seems to be broken, unless I am hosed up with my ISP.
One area of concern here is that as the baby boomers die off, say starting in 2015-2020 or so, won't a glut of "residences" begin to make itself known? Also, before those baby-boomers begin to die off in significant numbers, they will begin selling their homes, to secure that equity, and live the last five to fifteen years in active adult communities that later tend to be assisted living. What happens in 2030-2040 when there are say 100 million residences and only a demand for 80 million residences?