Ottawa is a helmet loving city. Informal surveys I do tend to show about a 60-40 split in favour of helmets though this may be skewed a bit because fewer cyclists wear helmets along the multi-use pathway than on busy arterials. I suspect it's more 70-30. Still, while crossing the Corktown Footbridge the other day I had 5 cyclists, one after another, come around the corner in about one minute and not a helmet was in sight. Here they are in order.
I love this vintage CCM bike!