Overall, it is clear that buses and trains were the most frequently used modes of transport among those shown, while bicycles, motorbikes and air travel accounted for a much smaller proportion. In addition, the total passenger distance travelled increased noticeably over the ten-year period.
In both years, buses and railways dominated passenger transport, with figures of around 42 and 38 billion passenger kilometres in 1990 respectively. By 2000, both categories had risen slightly, reaching approximately 47 billion for buses and 42 billion for rail. By contrast, the distances travelled by bicycle and motorcycle were minimal, standing at only about 5 billion kilometres or less in each year, with no significant change over the decade.
Air travel was the least common means of transport in 1990, with roughly 2 billion kilometres, but it showed a modest growth by 2000. The total passenger kilometres travelled across all forms of transport rose significantly, from around 100 billion in 1990 to about 115 billion in 2000.
In summary, while buses and trains consistently carried the majority of passengers, air travel was the only category that experienced a noticeable upward trend, and overall transport usage increased slightly during the period.