And btw, we French don't have a bicycle culture. For us every day bicycling (not sport) is for people that can't afford a car (and the rare idealists that think they're going to save the planet).
I'm always amazed at the number of bikes I see when I go in Germany or Holland (never went to Denmark). It's not a matter of money, they are richer than us, it's really cultural.
If you really want to see more bicycles on French roads you need gas to be at about 2€ / liter (Google says it's about 8 bucks for a gallon).