According to the U.S. Census Bureau (2009), total e-commerce sales for 2008 were estimated at $133.6 billion, an increase of 4.6 percent (±1.8%) from 2007. Total retail sales in 2008 decreased 0.6 percent (±0.4%) from 2007. E-commerce sales in 2008 accounted for 3.3 percent of total sales. In the past eight years this trend has been consistent with a growth range of 4.6 % to 32.6%. This growth rate is impressive, especially when compared to the moderate to weak traditional retail year over year sales growth in the same time-period (-0.6% to 6.5%). Further, the total number of “brick and mortar” retail establishments decreased by 0.7% from 1997 to 2002, but the number of non-store retailers increased by 23.5% (U.S. Census, 2002)

Internet Retailer identified top 10 US E-Retailers in sales volume as follows:

America's Top Ten Retail Businesses
Rank	Company	Web Sales Volume	Rank	Company	Web Sales Volume
1	Amazon.com Inc.	$19.2 B	6	OfficeMax Inc.	$3.1 B
2	Staples Inc.	$7.7 B	7	Sears Holding Corp.	$2.7 B
3	Dell Inc.	$4.8 B	8	CDW Corp.	$2.6 B
4	Office Depot Inc.	$4.8 B	9	Newegg.com	$2.1 B
5	Apple Inc.	$3.6 B	10	Best Buy	$2.0 B

Source: Internet Retailer Top 500 Retail Web Sites