After years of speculation, we finally have some clarity on how many Amazon Prime members there actually are.

CEO Jeff Bezos revealed for the first time in a message to shareholders on Wednesday the company has now “exceeded 100 million paid Prime members globally.” That comes 13 years after the Seattle-based company launched the service, which gives its customers a number of perks, like free two-day shipping and access to Amazon Video, for $99 a year.

Allow us to do some quick math for you: That’s nearly $10 billion a year in memberships — not even counting the items customers are actually buying on Amazon. In related news, the company boasts a $740 billion market cap.

Also Read: Amazon Orders First Animated Comedy Series From 'Bojack Horseman' Duo

“In 2017 Amazon shipped more than five billion items with Prime worldwide, and more new members joined Prime than in any previous year – both worldwide and in the U.S. Members in the U.S. now receive unlimited free two-day shipping on over 100 million different items,” said Bezos in his note to shareholders.

Bezos added that Amazon had its biggest “Prime Day” — the company’s annual deal day — ever in 2017.