Number of bicycles: 881,000 bicycles in a city of 780,000 residents (January 2011 figures from the Amsterdam Department for Research and Statistics). That is 1.3 bicycles per person! - Police periodically put orange tags on parked bikes. Those with tags remaining after a month or so get impounded.
It isn't just budget or fitness conscious people choosing the bicycle as their primary mode of transportation. Citzens of all ages and socio-economic backgrounds bike the city. Many do not even own cars. Here a mother and her son walk through a multi-story bicycle parking ramp after locking up their bike near Amsterdam Central Station