CHART: Amazon accounts for 80% of the U.S. books, music, and video market online

According to recent estimates by Insider Intelligence, Amazon is expected to account for 38.2% of all e-commerce sales in the United States this year.

The company's dominance extends beyond just the books, music, and video category, as it is also predicted to capture 50.3% of computer and consumer electronics e-commerce sales and 47.0% of office equipment and supplies e-commerce sales in the country.