I'm astonished at that graph. Jet fuel is more expensive than normal petrol ("gas") right?
So, if it's $5 a gallon in the US for Jet Fuel, in the UK for petrol you'd pay roughly £6.10 for a gallon of normal car fuel[1] which is like $9.60 .
Seriously? it's cheaper to fuel a private jet in the US than a car in the UK?
[1] estimated from http://www.petrolprices.com/search.html?search=London%2C+Mid... based on the cheapest price in London. Prices quoted are for 1 Litre.