alt Hacker NewsThis source[0] is hardly unbiased, so take this with a heavy dose of "citation needed", but it claims:
> 62 million Americans had fraudulent charges on their credit or debit cards last year alone, with unauthorized purchases exceeding $6.2 billion annually.
However, that jibes with other numbers I've seen.
https://www.security.org/digital-safety/credit-card-fraud-re...
That jives with the number of unauthorized transactions I've had on my cards. 62/260 million adults = about a quarter of adults each year. On average I probably average a fraudulent transaction in a quarter of the years.