Astonishing stat of the week

Or is it really so astonishing? (From this week's Economist, which I have here in front of me): "The residents of just 20 streets on the east side of Central Park donated more money to the 2004 presidential campaigns than all but five entire American states." Of which New York presumably is one. I have heard that Park Avenue in the 60s-80s is the most densely populated zip code in the United States, but sheesh.