While the data here is dated, it still is an interesting graph. Also note this was written about 6 months before the entire housing industry in the US collapsed causing the Great 2008 Economic Downfall. Guess that really was a housing bubble ?
So I like this graph just because it explains why folks in the U.S. are just so worried about the housing bubble, given how housing prices have increased so out of proportion from what they have been historically. Very interesting stuff.