Gyroscopic Investing

I'm looking at this: http://www.fdbetancor.com/wp-content/up ... 8x1024.png

This pyramid is shown as usual, in reference to the general population.

Does anybody know what the Investor Population curve looks like, and what effect it may have on the markets over the next 20-30 years?

Interesting.  Do you have access to older snapshots?  It would be interesting to see that curve in previous decades.

How the hell do they predict the curve 40 years into the future?  For some reason fewer females will be born?  Looks like they include immigration.