NB: Data for this list has been pulled from the United Nations’ Department of Economic and Social Affairs World Population Prospects (2015 Revision). Different reporting agencies list slightly different numbers and sometimes categorize countries differently. For instance, the CIA classifies Monaco and San Marino as individual countries; they then list both lands in the top five. (Monaco’s average life expectancy at birth is even a whopping 89.52 years, blowing all other countries out of the water by at least five years.) However, numbers for these countries can be skewed as many of them have large, wealthy immigrant populations who live longer and highly affect the data. Thus, the UN report is used.
