Craigslist released numbers it touted as evidence of its success in reducing the volume of "erotic services" ads appearing on the Web classified site in an apparent response to a federal lawsuit that accuses the site of facilitating prostitution. The number of ads for such services is down 90 percent to 95 percent during the past 12 months on Craigslist sites that serve five major U.S. cities, according to information posted on a company blog.