According to a report released by Optent, an IT security and filter company, the number of pro-ana and pro-bulimia websites increased by 470% between 2006 and 2007. The report, which sampled about 3 million random websites, also found that violent content increased by 125%, racist websites increased by 70%, and child pornography websites increased by 18%. The increase in this type of content could be related to the 455% increase in "personal websites" (20,889 in 2007 vs. 3,763 in 2006) recorded in the report, on which a lot of pro-ana material appears. [Optenet]