I've looked at the graphs, they may be right, but it doesn't feel right.

Right now, I am living in a city and working from home, so the 1.5km / day figure seems to apply to me.

But when I was in school, many many moons ago, the roundtrip to school was 14km and I had a newspaper delivery round adding up to about 20km.

So basically as a teen, I did 20km a day, about 6 days a week.

disclosure: I am Dutch, living in NL