| Characteristic | Annual growth |
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Region
United States
Survey time period
2014 to 2019
Supplementary notes
* The value for 2019 is estimated and the values from 2020 through 2040 are forecasted.
** Values calculated by the source; all other values are calculated by ÌÇÐÄÆÆ½â°æ using values provided by the source.
Data through 2015 was taken from previous editions.
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