What was the average lifespan of humans in the U.S. in 2000?

Answer 1

The maximum life span for humans (authenticated at 122 years) has probably changed very little in the last several centuries. The average life span, however, has increased greatly. For persons living in industrialized countries, the average life span has risen from 35 or 40 years of age at the end of the 18th century to about twice that age today, about 77.7 years in the United States in 2005. The 2000 U.S. census revealed that the number of Americans over 65 years old has more than doubled since 1950 and increased from 31.1 million to 34.91 million from 1990 to 2000, largely because of continuing advances in medical science and nutrition. In 2000, women outnumbered men about three to two in the over-65 age bracket, and in the over-85 age bracket they outnumbered men by more than two to one. The average life expectancy of American women now exceeds that of American men by about five years (79 for females born in 2000, and 74 for males born in that year).

Answer 2

The IQ and the life expectancy of the average American recently passed each other going in the opposite direction. I'll let somebody else give you the number.

Answer 3

Depends on where you live. Crime & air quality differ.