This is a very interesting tidbit from the Illinois Corn Growers:

If you are keeping a scorecard, the U.S. ethanol industry now has 91 plants operation in more than 20 states. Together, they have a production capacity of about 4.1 billion gallons. There is nearly 1.2 billion or another 21 plants in additional capacity under construction. Now after taking the time to read this I hope you didn’t try to memorize the numbers because they will change again before you put your combine in the shed.