didn't know that,ok, so it was 2001
you might find this map interesting,
warning, big .pdf file, just under 3 MB.
http://www.exxon.com/USA-English/Files/US%20Gasoline%20Map%20100102.pdf
14 different kinds,
changes seasonally, summer, spring/fall, winter
regular,mid,premium
I don't blame Bush for all or even most of this,
but he doesn't seem to be helping me much, either
So you want the government to help you and you call yourself a conservative.
I've referred to that map before. If you find the current one in jpg (same version as your pdf) I would appreciate a link.