Chart of the Day, Part Two

Via Stuart Staniford, this chart from the Brookings Institute is pretty interesting:

Go to the interactive map here.  The pummelling of the Rust Belt is pretty obvious.  It is notable that the biggest blue dot on the map is McAllen, Texas.  Anybody think a lot of Texas' economic growth is attributable to immigration?  Of course, median household income in McAllen increased 4.6% from $32,500 to $34,000 (Metro Detroit showed the largest decrease, 25%, from $65,000 to $48,500).  The other two fair sized blue dots are Washington D.C. and Norfolk.  If you look at the 2006 to 2000 map, New Orleans has the highest growth in median income.  I would like to know how much of that growth was from rebuilding dollars, and how much was from the physical relocation of large numbers of poor people.