From Reuters, via the Boston Globe:
The new head of Washington’s anti-piracy drive has made China his first official overseas destination to drive home the point that the mainland is the main culprit in the huge business of counterfeit products…
Washington says about 70 percent of the counterfeit products that enter the United States are from China, while piracy in general costs U.S. businesses about $250 billion in lost sales annually.
See also “China’s piracy problems ‘remain severe’” from the Financial Times.