Increase in Life expectancy in the United States during the 20th Century 80 70 Expected Life Span v = 11.9083 +14.0628x 60 r = 0.996646 r = 0.993304 50 2.5 3.5 4 4.5 5 In( Year)Increase in Life expectancy in the United States during the 20th Century 70 Expeded Life Span 50 1.920 1,940 1,960 1,980 2.000 YearIncrease in Life Expectancy in the United States during the 20th Century Year Expected. Expected 1" - - - - Life Span Year Life Span 1920 54. 1 : 1975 72.6 1930 59. 7 1980 73.7 1940 62. 9 1985 74.7 1950 68. 2 - - 1990 ; 75.4 1960 69. 7 1995 75.8 1970 70.8 Source: National Center for Health Statistics, published in the 1998 World Almanac