"U.S. Wind Energy Installations Top 20 Gigawatts"

Interesting article:

Wind now provides 20,152 MW of electricity generating capacity in the U.S.

The U.S. had 1,000 MW of wind power installed by 1985, 2,000 MW installed by 1999, 5,000 MW by 2003 and 10,000 MW were installed by mid-2006.

When I have some free time I want to plot these numbers and see what kind of growth curve this represents. Awesome numbers in any case!