Yup, and the price is now going up another 10%.
Take a look at Aluminum prices for the last 25 years. They have been up and down ten times. They have been at 0.45 to 1.40 and all over the park. They are about what they were 25 years ago, just over a buck a pound.
http://www.infomine.com/investment/metal-prices/aluminum/all/