I didn't record my mileage until I bought a Lemond Versaille in September '06, hit 50,000 total miles in August. That is on all bikes, so far this year 5,800, had a couple years of 8,000 plus. I ride year around but last couple years winter in Austin TX so warmer.
I turned 70 in June, have arthritis and ride for physical and mental health. My doctor says keep it up!