I've been watching more of the Tour de France on TV this year. I've always liked watching the race and thought it would be interesting to compare what I've seen so far this year in the mountain stages to a previous tour like 2000. Wow!
I think 90+% of the group must have been doping back then. Just by visual comparison, the way they climbed the mountains and looked after finishing vs. more recent years is all the proof one really needs.