This graph gives a clear overview of how the preferred choice of transportation changed over the course of the 20th century. We can observe that in the 1950s commute by foot was the most popular likely due to the fact that the other modes of transport were sparsely avaliable, however bikes were also quiet popular followed by buses.
However as we near the 21st century we can clearly see the trends in the choice of transport reverse with the sole exception of buses, probably to their extensive routes and cheap ticket prices. The most noticable collapse is in the use of bikes, which was one of the most preferred modes of transport in the 1950s but quickly became the least preferred within a span of 5 decades.
Perhaps the most surprising statistic of this graph is the sudden spike in the percentage of travellers choosing car as their preferred mode of transport, this change was predominantly triggered by the introduction of cheaper cars making it avaliable to a larger demographic of people. To be able to facilitate the production of cheap cars, manufacturers probably had to scale thier productions to a large extent, this allowed them to retain profitability and still sell cheap and reliable cars to the public.
Despite this many people still used the bus over cars and bikes in the 1970s, these are probably migrants or workers who could not afford housing let alone a car or a bike, so their primary choice of transport was the bus which offered reliable and cheap transport. As Europe developed over the course of these decades we can clearly see the populations choice of transport go from ones that are affordable to modes that are more comfortable, premium and highly convenient.