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An Entity of Type : prov:Entity, within Data Space : webisadb.webdatacommons.org associated with source dataset(s)

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  • Some groups, such as government employees, firefighters, and clergy came in over longer periods, with coverage first being elective and later mandatory with limited exemptions. 1965 - Mass enumeration of those over age 65 without social security numbers for Medicare entitlement purposes - this meant that many who had never had a number were now assigned numbers even though never worked.
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