{
 "generated": "2026-10-09",
 "complete_records": 1378064,
 "records_in_candidate_duplicate_groups": 189506,
 "estimated_excess_records": 107129,
 "estimated_duplicate_share": 0.07773876975234822,
 "chance_agreement_benchmark_records": 111536,
 "by_vax_year": {
  "1921": 2,
  "1965": 2,
  "1977": 2,
  "1978": 2,
  "1986": 2,
  "1987": 2,
  "1988": 12,
  "1989": 43,
  "1990": 356,
  "1991": 625,
  "1992": 849,
  "1993": 793,
  "1994": 923,
  "1995": 1016,
  "1996": 979,
  "1997": 919,
  "1998": 937,
  "1999": 1108,
  "2000": 817,
  "2001": 875,
  "2002": 593,
  "2003": 662,
  "2004": 569,
  "2005": 574,
  "2006": 744,
  "2007": 1627,
  "2008": 1378,
  "2009": 1935,
  "2010": 1290,
  "2011": 865,
  "2012": 818,
  "2013": 952,
  "2014": 1577,
  "2015": 1815,
  "2016": 1780,
  "2017": 2982,
  "2018": 1596,
  "2019": 1111,
  "2020": 7763,
  "2021": 133523,
  "2022": 10740,
  "2023": 2372,
  "2024": 1050,
  "2025": 833,
  "2026": 93
 },
 "keys": [
  "AGE_YRS",
  "SEX",
  "STATE",
  "VAX_DATE",
  "ONSET_DATE",
  "vset"
 ],
 "note": "Exact agreement on six fields among US reports with all six present. Some agreements are genuine different people (e.g. twins, school clinics); the shifted-date benchmark estimates how often unrelated reports agree by chance."
}