Average of 2013 & 2014 is 8,282 miles per year.
I drive to work most of the time, 26 miles round trip. I try not to drive outside of this commute, but my car is often used for weekend trips, visiting nearby family, etc... I try very hard to ride only my bike on the weekend, and when the weather cooperates, to work once per week. If I didn't make that effort, it would probably be ~2,000 miles higher.