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      "eligibleCountries": 14,
      "dataStatus": "usgs_estimate"
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      "measureType": "geological_stock_estimate",
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  "sourceUrl": "https://pubs.usgs.gov/periodicals/mcs2026/mcs2026-silver.pdf",
  "sourcePublicationDate": "2026-02-06",
  "sourceRevisionDate": "2026-05-27",
  "dateModified": "2026-05-27",
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  "generatedAt": "2026-05-27T00:00:00.000Z",
  "entityPolicy": "Only individually named country rows are ranked. Other countries and World aggregates remain in the immutable raw snapshot and are excluded.",
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