You should have titled... "How much do you back that thang up?"
I'd guess about 2 miles/yr, if the avg car drives about 12-15000 miles/year then I'd say in about 50K miles anywhere from 4-6 miles only. Just a guess based on backing up approx 10 ft 3 times/day.
Once going to work, once going home and then one random stop somewhere throughout the day.
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