#' BEA Regional state personal income data, annual.
#'
#' State personal income and population, annual, various years.
#'
#' @source Bureau of Economic Analysis
#' @format Data frame with 1 row per year.
#' \describe{
#' \item{stabbr}{state abbreviation, factor}
#' \item{year}{Calendar year, integer}
#' \item{pcpi}{Per capita personal income, dollars, numeric}
#' \item{pop}{State population, thousands, numeric}
#' \item{spi}{State personal income, nominal, $ billions, numeric}
#' }
#' @examples
#' spi.a
"spi.a"
"comment(spi.a)"
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