my current commute (for the last 13 months since i've moved from the US to Munich) is 10km each way which i do an average of 4.9 times per week, so i have an average weekly of 10 x 2 x 4.9 = 98km = 61 miles

i also ride about 50-100 miles recreationally per week (mostly off-road), plus about 10-20 miles per week local trips like shopping or whatever (i don't have a car), so my total weekly miles is about 120-180 or about 6,000 to 10,000 miles per year which is simliar to my mileage the last 4 years or so.