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

demonstrated

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demonstrates

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that

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apply

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the proportion of three different

registrated

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registered

vehicles

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for business use in the US from 1970 to 2010.

Overall

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,

The most of

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most of the

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registered commercial vehicle was truck, the second one was

taxi

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taxis

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and

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, and

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the lowest one was

Bus

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buses

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. The proportion was maintained during the two decades. The most of vehicle used for business was truck, the proportion was nearly 50% of total

vehicles

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in 1970, and it droped to 30% in 1980, and

then

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the

ratio

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increase slightly to over 40% in 2010. The

ratio

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of

taxi

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taxis

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was over 20% of total

vehicles

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in 1970

and

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, and

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the number fluctuated between 10 to 40 percent and it was over 30% of total commercial use

vehicles

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in 2010. The

ratio

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of

bus

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buses

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was lower 10% in 1970

and

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, and

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the number grew to approximately 15% in

1980

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1980,

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with a

continueous

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continuous

fall afterwards. The

ratio

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in 2010 was even lower than

1970

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in 1970

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.