The US Customs and Border Protection agency made 9,702 seizures of counterfeit apparel and footwear valued at $236m during the 2012 fiscal year. 

Of those, it made 7,805 seizures of counterfeit apparel valued at US$133m and US$103.4m worth of footwear in 1,897 seizures.

The number was up on last year, when it seized $223.3m worth of clothing and footwear in 7,392 seizures.

The end of year report said China remains the primary source of counterfeit and pirated goods, accounting for 72% of all intellectual property rights seizures in 2012, up 12.5% from 2011.

Lev Kubiak, director of the National Intellectual Property Rights Center, said that the internet is fuelling the growth of counterfeit trade.

"As online commerce continues to expand, we are seeing more international criminal organisations exploiting cyberspace to further their criminal enterprises.

"Internet websites are increasingly the front end or entry point for consumers, businesses and criminal organisations to the international supply chain," said Kubiak.

"Attacking criminal activity at every point along the international supply chain, to include websites, manufacturers, shippers and shipping routes, border entry points, distribution networks and payment methods, is critical to CBP and Homeland Security Investigations' (HSI) enforcement efforts."