I'm curious how inmates get their percentage? Are you comparing miles/km-ON-road to miles/km-OFF-road or are you comparing Time?
For those that ride 90% offroad: I'm very envious. You must live in THE best part of the world to be near so much dirt. Or you REALLY like your neighborhood trail.
It takes me anywhere from 30-100 miles to get to anything decent. Combine that with my commute, I'm really racking up the miles on Slab. So, if I'm honest I'm only about 10% offroad by miles but 30% by Time (I ride slow off road).