In 2005, the number of people over age 65 was 13 percent of the population of the United States. According to the Census Bureau, this number will soar to 72 million by 2030 and constitute 20 percent of the population. The U.S. Census Bureau also reports that worldwide the 65-and-older population is projected to triple by 2050 from 516 million in 2009 to 1.53 billion in 2050, constituting approximately 16 percent of the world's population.

Germany, Italy, Japan, and Monaco have the greatest percent of 65 and over in their populations. In these countries, this age cohort makes up 20 percent of the population and by 2050 it is likely that Europe will be the oldest region in the world with 29 percent over 65. In ...

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