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TRANSPORTATION ENERGY DATA BOOK: EDITION 20 - Center for ...

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B-12<br />

Conversion of Constant Dollar Values<br />

Many types of in<strong>for</strong>mation in this data book are expressed in dollars.. Generally, constant<br />

dollars are used--that is, dollars of a fixed value <strong>for</strong> a specific year, such as 1990 dollars.<br />

Converting current dollars to constant dollars, or converting constant dollars <strong>for</strong> one year to<br />

constant dollars <strong>for</strong> another year, requires conversion factors (Table B. 13 and B. 14). Table B. 13<br />

shows conversion factors <strong>for</strong> the Consumer Price Index inflation factors. Table B. 14 shows<br />

conversion factors using the Gross National Product inflation factors.<br />

Due to the size of the tables, the data in Tables B. 13 and B. 14 were changed to two decimal<br />

places starting with Edition 17. However, three decimal places were used to calculate all constant<br />

dollar values.<br />

<strong>TRANSPORTATION</strong> <strong>ENERGY</strong> <strong>DATA</strong> <strong>BOOK</strong>: <strong>EDITION</strong> <strong>20</strong>-<strong>20</strong>00

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