Here's a question I've been wondering about for a while. We (our president in particular) keep talking about how we need to reduce dependency on foriegn oil sources. The solutions being proposed include increasing oil exploration in the U.S., including the Arctic Wildlife Refuge.

This is my question. How much of the oil that's being produced here in the U.S. is being exported to other countries. If relying on oil coming from the U.S. is so important, why don't we just keep more of what we produce here, instead of shipping it elsewere?