Amazon Prime is in its prime.

The subscription service that offers perks like free two-day shipping has passed 100 million subscribers in the U.S. alone.

That’s up from 90 million a year ago.

Consumer Intelligence Research Partners shared the news in a study published Thursday.

Amazon has not yet commented on the numbers.

Amazon Prime costs $119 a year or $13 a month.

Along with that free two-day shipping, members get reduced rates on overnight shipping.

Along with access to a variety of digital content through Amazon’s prime video, prime music, and audiobooks in audible.