I found this on ProCon.org
"The number of men paying women for sex has nearly doubled in a decade, UK research suggests. Surveys of 11,000 British adults in 1990 and 2000 found the rate increased from one in 20 to nearly one in 10 men."
"'Twice as Many Men' Pay for Sex," bbc.co.uk, Dec. 1, 2005
"It is possible that some of the change between 1990 and 2000 is the result of increased reporting, with a greater acceptability of commercial sexual contact, but we think this is unlikely to account for the whole increase.
The rate of divorce has increased, as has the proportion of men who are never or previously married, and this may explain some of the increased 'demand' for commercial sex. Further evidence for the growth in commercial sex can be found from studies of sex workers... [A]ll reports suggest an increasingly large and diverse sex industry, with more opportunities for the sale and purchase of sex via sex clubs, escort agencies, the internet, and sex tourism."
H. Ward, C. H. Mercer, K. Wellings, K. Fenton, B. Erens, A. Copas, A. M. Johnson, "Who Pays for Sex? An Analysis of the Increasing Prevalence of Female Commercial Sex Contacts Among Men in Britain," Sexually Transmitted Infections, Dec. 200