If you were born in the United States in the year 1900 and you were a male, you could probably expect to live only to the age of 46. A female born at the same time could expect to live slightly longer until the age of 49.
But if you were born in the 1970s, you can expect to live to about 67.6 years if you are a male, and to about 75.3 years if you are a female.
Modern medicine, better diet, and better living conditions have all helped make these increased years possible.
The country with the greatest life expectancy for its people is The Netherlands, with an average life span of 75.3 years for both sexes; while the lowest life expectancy is in the African country of Angola, where the average is only 38.5 years!