The life expectancy was about age 83.
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The average life expectancy of west-African slaves in the United States in 1850 was about 30 years which was close to the world average life expectancy. Average life expectancy for the entire United States was about 36 years in 1850 with average life expectancy what southern whites only about 31 years. The primary causes for low life expectancy in all populations in 1850 was infant mortality do to diseases that are now eleminated (sanitation and vaccination) or easily treatable in Western nations. Sub-Saharan, West Africa and developing nations retain a high infant mortality rate and therefore retain low life expectancy do to traditional lack of sanitation, resistance to medical interventions and overpopulation leading to lack of adequate caloric intake.
There was no fifty dollar US gold coin produced in 1940.
Increased life expectancy
The life expectancy for a male born in 1940 was around 60 years.
The life expectancy of a male in the US in 1975 was around 68.2 years.
The life expectancy was about age 83.
The total life expectancy in the U.S. is 78.14 years at birth, about 5 years less than Canada's life expectancy, 83.81 years.
The average life expectancy in the United States in 1935 was around 61 years.
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In 1969, the life expectancy for males in the US was around 66.9 years, and for females it was around 74.7 years.
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78.4 years
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The Japanese have the longest life expectancy in the world, not the US. The US rates closer to 34th-36th in nations of the world in terms of life expectancy, one of the lower rate among the developed world.
Life expectancy refers to the average length of time a person can expect to live. In the US, the life expectancy is around 80 years of age. In South America, the country with the lowest life expectancy is Guyana, with a life expectancy of 63.32 years of age.