The graph below shows changes in the share of vehicle registrations of the three most common types of commercial vehicles in the US between 1970 and 2010.

The line graph compares the percentages of three vehicles that were registered from 1970 to 2010.

Overall

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, it is obvious that the registration proportions saw a fluctuation over time.

While

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the licenses provided for trucks and taxis increased

at the end

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of the given period, the figure for buses witnessed an opposite trend. In 1970, nearly 49% of truck applications were approved, two and four times higher than that of taxi and bus , respectively. In the next ten years, the figure for trucks significantly dropped to 30% before a gradual growth in 2010. The certificate for taxi and bus remained the same status in the first 30 years. 23% and 5% of official records were recorded in taxis and buses in 1970. After a climb in 1980, those figures witnessed a fall in the next 20 years.

However

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, between 2000 and 2010, the percentage of taxi registrations experienced a sharp rise and reached its peak again by 2010. Meanwhile, bus

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apply

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recording was the lowest proportion, continuing to go down to approximately 3%.