demdata: Demographic data

#' Counts of Population in Sweden by Age, Sex, County, and Year. 
#'
#' The data are from the Statistics Sweden website.  The data refer
#' to the population as of 31 December in each year.  For instance, the
#' data for 2015 refer to the population as of 31 December 2015.
#'
#' Accents have been and umlauts have been removed from county names
#' to avoid problems with encoding. (Apologies to Swedish speakers.)
#'
#' @format An array with dimensions "age", "sex", "region", and "year".
#'
#' @source Database "Population by region, marital status, age and sex.
#' Year 1968 - 2015". Downloaded from Statistics Sweden on 18 January 2017.
"sweden.popn"