Wow for someone who's had a "bad month" those are some hefty stats!!
Perhaps when I was in Fuerteventura for a few weeks I was possibly knocking up close to 70 miles, and when training in Thailand I was definitely doing 50 miles a week (very very steady) on top of specific training....
But when combined with a full time job and "life" I don't think I've ever really topped 50 miles a week (including a long race at the end), and I strongly suspect on an average week I'm probably around 30 miles.