U.S. intellectual property (IP)-intensive industries employ at least 27.9 million workers and contributed more than $6.6 trillion dollars (38.2 percent) to U.S. gross domestic product (GDP) in 2014, according to Intellectual Property and the U.S. Economy: 2016 Update. In this update to a 2012 report, the United States Patent and Trademark Office (USPTO) and Economics and Statistics Administration (ESA) identified 81 industries (from among 313 total) as IP-intensive including trademark-intensive, copyright-intensive, and patent-intensive industries.