Around the world, including the United States, senior populations are rising much faster than those of other ages, as fertility rates have plummeted. Since the 2010 Census, the share of US population 65 years of age and older has risen 3.3 percent annually, more than four times the overall average of 0.7 percent and more than ten times the 0.3 percent average growth rate for people under 65 years of age (Figure 1).
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