County population

[eroten]

Adds 2021 county population data, saved in R/data, including metadata.

Checklist

Please complete this checklist as a courtesy to the PR reviewer.

Code and styling

• [x] All of the files/scripts I added are in the right place and named appropriately. See the README for details.
• [x] I have not used setwd()
• [x] I have used file.path(here::here(), "file_name")) to source any scripts or read in data
• [x] I have not added any large datasets, unless absolutely necessary (explain)
• [x] I have commented my code, particularly in hard to understand areas
• [x] I have added additional package dependencies as necessary to renv with renv::install()
• [x] I have run styler::style_dir(".", recursive = TRUE, filetype = c("R", "qmd"))
• [x] chunk formatting
  • [x] all chunks named
  • [x] all figure or table chunks have caption
  • [x] out.width: "95%" and out.height: "60%"

Document editing

• [x] I have named my code chunks
• [x] I have used out.width and out.height in percentage format in figure configuration
• [x] I have ensured that modified documents knit successfully from render_for_publication.R
• [x] I have fixed any missing citations
• [x] I have reviewed my contributions for typos and misspellings.

GitHub and project management

• [x] I have identified and assigned at least one Reviewer (Liz, Sam, Laine) to this PR
• [x] I have assigned myself to this PR
• [x] I have updated the status in the GitHub Project