Recently, the Direct Selling Association released its U.S. Direct Selling in 2011 Fact Sheet [PDF] which provided statistics for the percentage of direct sellers in the United States over the last five years.
In 2007, there were 15 million direct sellers. 15.1 million in 2008. 16.1 million in 2009. 15.8 million in 2010. And, 15.6 in 2011.