 She stated that women make up 90% of the labour force in the industry in Victoria and earn, on average, A$400–$500 per week, do not receive holiday or sick pay, and work on average four 10-hour shifts per week.According to her report, there has been an overall growth in the industry since legalisation in the mid-1980s and that with increased competition between prostitution businesses, earnings have decreased; 20 years ago there were 3000 to 4000 women in prostitution as a whole, as of the report, there were 4500 women in the legal trade alone and the illegal trade was estimated to be 4 to 5 times larger.Sullivan's study states that the sex industry is run by six large companies, which tend to control a wide array of prostitution operations, making self-employment very difficult; brothels take 50% to 60% of the money paid by clients and fine workers for refusing them.