11/24/2014 10:22 am ET Updated Nov 24, 2014

4 Keys To Living Longer And Better In Retirement

Liz Gregg via Getty Images

In 1970, average life expectancy at birth in the U.S. was 71 years. In 2014, it is 79 years; and by 2050, the U.S. Census Bureau projects that average life expectancy will be 84 years.

Today, according to the National Institute on Aging, there are over 40 million people in the U.S. aged 65 or older, accounting for about 13% of the total population. In 1900, there were just 3.1 million 65 or older Americans, or about 4.1% of the population.

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