[kuhfes]

The data is correct (for 2007), but misleading. It represents the % of online sales for companies that have retail stores.

The categories exclude sales from nonstore retailers. So for Hobbies (includes books), the percentage of retails stores revenue that sold online was 1.9%, however online retailers accounted for 20% of total book sales (in 2007)

The source of the data: http://www.census.gov/compendia/statab/2010/tables/10s1021.p...

As of 4th Q 2009, 4.3% of retail sales are online: http://www.census.gov/retail/mrts/www/data/html/09Q4.html

Forrester predicts online sales will account 6% of total US retail sales in 2009 and 2010, 7% in 2011 and 8% in 2012 and 2013. http://www.dmnews.com/e-commerce-is-flat-as-a-percentage-of-...

In 2007 20% of book purchases online http://www.publishersweekly.com/article/407236-Chains_Intern...