Not enough. Not yet, anyway. Although the Spams have been pushing exploration off the coast of South America and Africa. But that's a long way down the line. For the foreseeable future, ME oil is crucial.
It will be if we can't get any because some motherless rag fcuk has blown up a major terminal in Saudi. If Ras Tanura was hit hard, it would cut production by 8m barrels a day. The price would rocket and cars would become very thirsty very quickly.
When the Arabs imposed a partial oil embargo in 1972 in the wake of the Yom Kippur war - one they started and predictably lost - Europe was forced into power cuts, three-day weeks and rationing. Not funny.