In the U.S. in 1900 this was 46.3 for males & 48.3 for females; in 2000 it was 74.3 & 79.7
[DOC] [TLE] Mean Life Expectancy | BIOL 155 - Courses [PAR] The spectacular increase in the American life span from 47 years in 1900 to 78 
years in 2015 is largely ... 1900, 46.3, 48.3, 48.5 ... 2000, 74.3, 79.7, 77.0 ...