of entertainers appear on stage within a single year. Global industry The U.S. and international markets for clubs offering Americanized striptease are not well defined and published revenue figures are estimates. In 2002, the size of the U.S. industry was estimated to be US$3.1 billion, spanning 2,500 clubs and generating 19% of the total gross in legal adult entertainment revenue. The U.S. market for strip clubs was estimated to be as large as US$15 billion in 2005. That same year the U.S. state of California alone accounted for US$1 billion in revenue, and the total size of the global strip club industry was estimated to be US$75 billion. Also, in 2005, an estimated 300,000 women worked as strippers in the U.S., across 3,000 clubs. An industry insider in 2008 estimated the U.S. strip club market at close to US$2 billion, basing that estimate on Adult Video News Media Network (AVN) statistics and highlighting both the methodological variances of different studies and the difficulties of providing reliable statistics on the industry. Since then, the number of clubs in the U.S. has grown to approximately 4,000 by 2010. In Britain the number of strip clubs rose over 1,000 percent between 1997 and 2010. In 2008 alone, a strip club opened there almost every week. One factor in the proliferation of British strip clubs is Britain's 2003 Licensing Act, which introduced the one-size-fits-all premises licence, which meant that strip clubs in Britain no longer had to receive special permission for nudity. In 2005, revenues for the UK strip club industry, one of the fastest growing sectors of its leisure industry, were estimated to be GB£300 million. Revenues for 2006 in Scotland alone accounted for GB£20 million of the UK total. Markets and ownership American-style striptease, closely associated with contemporary clubs around the world, began to appear outside North America in the post-World War II era, emerging in Asian performances during the late 1940s and in European theaters by 1950. A contemporary example, the American Spearmint Rhino chain, has clubs located in the UK, Russia, and Australia, as well as the United States. In 2003, the company's London location reportedly made GB£3 per minute. Strip clubs offering American striptease and other adult entertainment services have been established on six of seven continents (all except Antarctica), and the demand for these types of business is soaring in economically developing nations. Most adult entertainment companies, which