I'm unable to produce the research link, ATM, however I attended a presentation many years ago on the uniqueness value of this data. In the presentation the res

I'm unable to produce the research link, ATM, however I attended a presentation many years ago on the uniqueness value of this data. In the presentation the researchers demonstrated >80% confidence interval determining an exact individual from: (1) gender, (2) birth year, and (3) zip code. I recall the interval was for zip codes with the greatest population density, implying that more confidence was readily achievable in less populated zip codes.