The given bar chart illustrates the number of people in thousands who used three different means of public transport, namely tram, bus, and train, in Somewhere town over a four-year period from 2012 to 2015. Overall, while the figures for bus and train usage fluctuated greatly, transport by tram grew significantly and became the most popular option.
In 2012, the number of commuters who used trains was the highest at over 75,000 passengers. However, in the following year, this figure plummeted to only 17,000 passengers, which made the train the least used means of public transport. Regardless, train usage steadily grew over the next two years, ending with 60,000 passengers in 2015. Similarly, the number of bus passengers started at 55,000, before it went through a period of erratic behavior in the next two years. In 2015, this figure roughly returned to its starting point and ranked last with around 57,000 passengers.
On the contrary, only 18,000 commuters used trams in 2012, which made this means of public transport the least popular one. The number then surged to around 95,000 passengers in 2015, which was approximately five times its starting point. This also made trams the most popular option by the end of the four-year period.