and anti-prostitution activist Melissa Farley found that 68% reported having been raped and 82% reported having been physically assaulted. A variation of street prostitution is that which occurs at truck stops along Interstate highways in rural areas. Called "lot lizards", these prostitutes solicit at truck stop parking lots and may use CB radios to communicate. In today's society there is a hierarchy amongst prostitutes and an even greater distinction between indoor workers and outdoor workers. The indoor prostitutes occupy the top tier to include independent call girls, and workers in brothels and massage parlors. The outdoor street walkers occupy the lowest level and are more likely to experience abuse. 250 prostitutes, including 150 outdoor workers and 125 indoor workers, were interviewed for a study about victimization. Weitzer, R (2005) noted that indoor workers experienced less harm compared to outdoor workers: The outdoor prostitutes or streetwalkers are the most recognized sex workers, but they make up a small number of workers. Cunningham & Kendall (2011) report that only 20% of prostitutes work on the streets. The indoor workers have more freedom to choose their clients and set boundaries that contribute to their safety. Escort or out-call prostitution In spite of its illegality, escort prostitution exists throughout the United States from both independent prostitutes and those employed through escort agencies. Both freelancers and agencies may advertise under the term "bodywork" in the back of alternative newspapers, although some of these bodywork professionals are straightforward massage professionals. The amount of money made by an escort differs depending on race, appearance, age, experience (e.g., pornography and magazine work), gender, services rendered, and location. Generally, male escorts command less on an hourly basis than women; white women quote higher rates than non-white women; and youth is at a premium. In the gay community, one escort agency in Washington, D.C., charges $150 an hour for male escorts and $250 an hour for transgender escorts. That agency takes $50 an hour from the escort. In larger metropolitan areas such as New York City, extremely attractive white American female escorts can charge $1,000–$2,000 per hour, with the agency taking 40%-50%. Typically, an agency will charge its escorts either a flat fee for each client connection or a percentage of the prearranged rate. In San Francisco, it is usual for typical heterosexual-market agencies to negotiate for as little as $100 up to a full 50% of a woman's reported