The graph illustrates the number of people who used four types of public transport in Iceland between 2012 and 2015.
Overall, while there were fluctuations across all categories, buses consistently remained the most commonly used mode of transport throughout the period. In contrast, taxis were the least popular, although they showed a noticeable rise by the end of the period.
In 2012, bus usage was the highest, with around 80,000 passengers. This figure declined steadily over the next two years, reaching approximately 65,000 in 2014, before experiencing a slight increase in 2015. Train usage showed a similar pattern, though at a lower scale: it began at roughly 55,000 passengers in 2012, dipped to just under 50,000 in 2014, and recovered slightly thereafter.
The number of people using trams showed moderate but consistent growth, rising from about 40,000 in 2012 to nearly 50,000 by 2015. Taxis, while initially the least used (around 30,000), saw the most dramatic increase, with user numbers climbing steadily to nearly 45,000 by the end of the period.
In summary, although buses remained dominant, trams and taxis gained popularity over time, reflecting a diversification in public transport preferences among Icelandic passengers.