Here are some statistics on porn from Jerry Ropelato of Top Ten Reviews (who claimed that all of them come from reputable sources)

Pornographic websites: 4.2 million (12% of total websites)
Pornographic pages: 420 million
Daily pornographic search engine requests: 68 million (25% of total search engine requests)
Daily pornographic emails: 2.5 billion (8% of total emails)
Internet users who view porn: 42.7%
Worldwide visitors to pornographic web sites: 72 million visitors (monthly)
Internet pornography sales: $4.9 billion

Every second, 28,258 Internet users are viewing pornography
Every second, 372 Internet users are typing adult search terms into search engines

Statistics from GOOD Magazine:

35% of all Internet downloads are pornographic in nature
Every day 266 new porn sites appear on the Internet
"Sex" is the most searched word on the Internet
70% of Internet porn traffic occurs during the 9-5 workday
US produced 89% of all online porn

http://www.internet-filter-review.topte ... stics.html