NEW YORK: With Adele’s album “25” breaking sales records, one of the keys to the British singer’s success is an unusual pop music demographic — older adults.

The buyers of “25” come from “a demographic not normally closely examined in the millennial-fixated entertainment industry,” sales tracking service Nielsen Music said in a study.

US consumers who bought the CD of “25” in its first week were 36 percent more likely than the average American to be between ages 55 and 64, Nielsen Music said.

They also skewed wealthier, with buyers of “25” two thirds more likely to have a household income above $100,000 a year.

However, the study did not look at who bought “25” on iTunes, and could presumably be younger.

Nielsen Music released the data late Thursday as it announced that “25” had sold more than five million copies since its release on November 20.