Medicare enrollment increased by 1.1 million in year ending December 1999.
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D000368:Aged; D003625:Data Collection; D018166:Health Care Reform; D006297:Health Services Accessibility / Q000639:trends; D006801:Humans; D008484:Medicaid / Q000706:statistics & numerical data* / Q000639:trends; D006278:Medicare / Q000706:statistics & numerical data* / Q000639:trends; D014481:United States