CIA World Factbook Data In Interactive Format
World - The World Factbook
Median age per country (based on CIA world factbook) : r/MapPorn
Details - The World Factbook
Map: Median age by country - SAS Learning Post
World and Regional Maps - The World Factbook
Details - The World Factbook
Korea, South - The World Factbook
United States - The World Factbook
United States - The World Factbook