OpenIntro features a number of free books that can be used in high school and AP statistics courses. The license on these datasets is currently unknown. You can find out more about OpenIntro at https://www.openintro.org.
Country ISO information
Country International Organization for Standardization (ISO) information.
country_code - Two-letter ISO country code.
country_name - Country name.
year - Year the two-letter ISO country code was assigned.