There are also a lot of cyclists, like more people cycling around during the day than in Sydney, despite hardly any delivery cyclists.
Could be flatness, or a summer only phenomenon, could be because the public transport is inferior, could be lack of helmet laws, could even be that the grid street network is highly navigable? Easy to remember which streets have bike lanes (and they aren't afraid of putting them on 'main' streets) and to work out which streets will be quiet local streets.