In the letter, Bezos stressed the importance of having high standards in running a business. By setting high standards, companies are able to live up to “ever-rising customer expectations,” he said.
Bezos also disclosed for the first time that Prime now exceeds 100 million members worldwide. In 2017 alone, Amazon shipped over five billion items through its Prime service worldwide.
You can also read the SEC filing here, which has some interesting snippets such as:
13 years post-launch, we have exceeded 100 million paid Prime members globally. 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.