Note the great "analysis" from Australia's New Air Combat Capability (NACC) office (read copy-paste from Lockmart). Still trying to figure out what--if any--value the NACC brings to the taxpayer other than mindless cheerleading for the seller of the aircraft.
(click image to make bigger)
Update: U.S. DOD announcement January 2012. The graphic below, representing yearly orders only going to 2016 as this is the year some--like Canada--state great advantage in F-35 price because of that year representing "peak production".