Most important takeaway:

“It was found that 87% (216 million of 248 million) of the

population in the United States had reported characteristics that likely made them unique based

only on {5-digit ZIP, gender, date of birth}. About half of the U.S. population (132 million of 248

million or 53%) are likely to be uniquely identified by only {place, gender, date of birth}, where

place is basically the city, town, or municipality in which the person resides. And even at the

county level, {county, gender, date of birth} are likely to uniquely identify 18% of the U.S.

population. In general, few characteristics are needed to uniquely identify a person.”

The rest is backing up the claim.