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#' Value and Circulation of Currency
#'
#' This dataset contains, for the smaller bill denominations, the value of the bill and the total value in circulation. The source for these data is \emph{The World Almanac and Book of Facts 2014}.
#'
#' @format A data frame with 5 rows and 3 variables:
#' \describe{
#' \item{BillValue}{denomination}
#' \item{TotalCirculation}{total currency in circulation in U.S. dollars}
#' \item{NumberCirculation}{total number of bills in circulation}
#' }
"Currency"
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