Country-level data can be accessed at the following repositories:
Life Expectancy - World Health Organisation: http://www.who.int/gho/mortality_burden_disease/life_tables/en/
GDP - The World Bank: https://data.worldbank.org/indicator/NY.GDP.MKTP.CD
Region - The World Bank's Country and Lending Groups classifications: https://datahelpdesk.worldbank.org/knowledgebase/articles/906519-world-bank-country-and-lending-groups