[
 {
  "country": "United States",
  "cases_last_36_months": 32,
  "ownership_rate_pct": 9.0,
  "estimated_holders": 25298962,
  "attacks_per_100k_holders_per_year": 0.04,
  "ci95_low": 0.03,
  "ci95_high": 0.06,
  "survey": "Federal Reserve, SHED 2025 (table 33)",
  "what_is_measured": "bought or held crypto as an investment in the previous 12 months",
  "url": "https://www.federalreserve.gov/publications/files/2025-report-economic-well-being-us-households-202605.pdf"
 },
 {
  "country": "United Kingdom",
  "cases_last_36_months": 10,
  "ownership_rate_pct": 8.0,
  "estimated_holders": 4590002,
  "attacks_per_100k_holders_per_year": 0.07,
  "ci95_low": 0.03,
  "ci95_high": 0.13,
  "survey": "FCA, Cryptoasset Consumer Research 2025 (wave 6)",
  "what_is_measured": "held crypto-assets at the time of the survey",
  "url": "https://www.fca.org.uk/publication/research-notes/cryptoasset-consumer-research-2025-wave-6.pdf"
 },
 {
  "country": "Canada",
  "cases_last_36_months": 7,
  "ownership_rate_pct": 9.9,
  "estimated_holders": 3467678,
  "attacks_per_100k_holders_per_year": 0.07,
  "ci95_low": 0.03,
  "ci95_high": 0.14,
  "survey": "Bank of Canada, Bitcoin Omnibus Survey 2023",
  "what_is_measured": "held BITCOIN only (Ether 5%, others 3%)",
  "url": "https://www.bankofcanada.ca/wp-content/uploads/2025/03/sdp2025-4.pdf"
 },
 {
  "country": "Germany",
  "cases_last_36_months": 5,
  "ownership_rate_pct": 7.0,
  "estimated_holders": 5032951,
  "attacks_per_100k_holders_per_year": 0.03,
  "ci95_low": 0.01,
  "ci95_high": 0.08,
  "survey": "Bundesbank, Payment Behaviour in Germany 2025",
  "what_is_measured": "has already bought crypto tokens or paid with them — a cumulative measure, not holdings at a point in time",
  "url": "https://www.bundesbank.de/resource/blob/997852/1b30fa6978e2f05229d91beceeaf78cc/472B63F073F071307366337C94F8C870/zahlungsverhalten-in-deutschland-2025-data.pdf"
 },
 {
  "country": "France",
  "cases_last_36_months": 81,
  "ownership_rate_pct": 11.0,
  "estimated_holders": 6296083,
  "attacks_per_100k_holders_per_year": 0.43,
  "ci95_low": 0.34,
  "ci95_high": 0.53,
  "survey": "Adan / Ipsos, 2026 Barometer",
  "what_is_measured": "held crypto-assets at the time of the survey",
  "url": "https://www.adan.eu/"
 },
 {
  "country": "Netherlands",
  "cases_last_36_months": 5,
  "ownership_rate_pct": 20.0,
  "estimated_holders": 3057970,
  "attacks_per_100k_holders_per_year": 0.05,
  "ci95_low": 0.02,
  "ci95_high": 0.13,
  "survey": "Adan / Ipsos, 2026 Barometer",
  "what_is_measured": "held crypto-assets at the time of the survey",
  "url": "https://www.adan.eu/"
 },
 {
  "country": "Italy",
  "cases_last_36_months": 2,
  "ownership_rate_pct": 13.0,
  "estimated_holders": 6752443,
  "attacks_per_100k_holders_per_year": 0.01,
  "ci95_low": 0.0,
  "ci95_high": 0.04,
  "survey": "Adan / Ipsos, 2026 Barometer",
  "what_is_measured": "held crypto-assets at the time of the survey",
  "url": "https://www.adan.eu/"
 },
 {
  "country": "Belgium",
  "cases_last_36_months": 5,
  "ownership_rate_pct": 15.0,
  "estimated_holders": 1494254,
  "attacks_per_100k_holders_per_year": 0.11,
  "ci95_low": 0.04,
  "ci95_high": 0.26,
  "survey": "Adan / Ipsos, 2026 Barometer",
  "what_is_measured": "held crypto-assets at the time of the survey",
  "url": "https://www.adan.eu/"
 }
]