Below is the percentage of each group who use the internet, according to our December 2008 survey. As an example, 75% of adult women use the internet.
The average teenager spends one hour and 40 minutes a week browsing sites for pornography, according to new research.
That equates to 87 hours a year spent surfing for porn. A further hour and 35 minutes is spent looking at dieting and weight loss websites.
The study of 1,000 youngsters found the average teenager was online 31 hours each week looking at soft pornography, plastic surgery, dieting, family planning and emotional support