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#' Historical production of crude oil, worldwide 1880-2014
#'
#' Annual production of crude oil, in millions of barrels (mbbl).
#'
#' @docType data
#' @name Oil_history
#' @usage data(Oil_history)
#'
#' @keywords datasets
#'
#' @format
#' A data frame with 47 cases, each of which is a US state, with observations on the following variables.
#' \itemize{
#' \item{\code{year}} {the year for which production is reported}
#' \item{\code{mbbl}} {oil production in millions of barrels}
#' }
#'
#' @source Assembled from older information from RH Romer (1976) "Energy: An Introduction to Physics" and more recent
#' data from \code{data.oecd.org}.
#'
#' @examples
#' model <- lm(log(mbbl) ~ year, data = Oil_history)
#' mod_plot(model)
"Oil_history"
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