The graph doesn't show what might have been. Compulsory helmet use is a big turn off for many people, especially if you are commuting to work. There is the "helmet hair" factor that may seem frivilous to some but it's a deal breaker to others....50% of the population maybe?
ps it's safe to say there are not more people riding because helmets are compulsory...
pps we are almost out on our own on this, check out the red areas
https://en.m.wikipedia.org/wiki/Bicy...aws_by_country





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