The answer is "32 percent".
Education levels are expanding. Among individuals of ages sixty-five and more in 1965, just 5 percent had finished a four year certification or more. By 2014, this offer had ascended to 25 percent.
Fact: Normal U.S. life expanded from 68 years in 1950 to 79 years in 2013, in huge part because of the diminishment in mortality at more late ages.