servicemen, a tradition that continues today. In 1975, there were only 40 tattoo artists in the country; in 1980, there were more than 5,000 self-proclaimed tattoo artists, appearing in response to sudden demand. Many studies have been done of the tattooed population and society's view of tattoos. In June 2006, the Journal of the American Academy of Dermatology published the results of a telephone survey of 2004: it found that 36% of Americans ages 18–29, 24% of those 30–40, and 15% of those 41–51 had a tattoo. In September 2006, the Pew Research Center conducted a telephone survey that found that 36% of Americans ages 18–25, 40% of those 26–40 and 10% of those 41–64 had a tattoo. They concluded that Generation X and Millennials express themselves through their appearance, and tattoos are a popular form of self-expression. In January 2008, a survey conducted online by Harris Interactive estimated that 14% of all adults in the United States have a tattoo, slightly down from 2003, when 16% had a tattoo. Among age groups, 9% of those ages 18–24, 32% of those 25–29, 25% of those 30–39 and 12% of those 40–49 have tattoos, as do 8% of those 50–64. Men are slightly more likely to have a tattoo than women. Since the 1970s, tattoos have become a mainstream part of Western fashion, common both for men and women, and among all economic classes and to age groups from the later teen years to middle age. For many young Americans, the tattoo has taken on a decidedly different meaning than for previous generations. The tattoo has undergone "dramatic redefinition" and has shifted from a form of deviance to an acceptable form of expression. As of 1 November 2006, Oklahoma became the last state to legalize tattooing, having banned it since 1963. Australia Branding was used by European authorities for marking criminals throughout the seventeenth and eighteenth centuries. The practice was also used by British authorities to mark army deserters and military personnel court-martialed in Australia. In nineteenth century Australia tattoos were generally the result of personal rather than official decisions but British authorities started to record tattoos along with scars and other bodily markings to describe and manage convicts assigned for transportation. The practice of tattooing appears to have been a largely non-commercial enterprise during the convict period in Australia. For example, James Ross in the Hobart Almanac of 1833 describes