"[T]he share made of 55+ year-olds has increased from 16% to 19% - a relative increase of 22%," according to Nielsen Online. And that would be interesting enough by itself. Every increase has to correspond to a decrease, though, and the decline occurred in what might be the least-expected place."Over the last year (Oct 06 - Oct 07), the share of the UK Internet population made up by under 25 year-olds has decreased from 29% to 25% - a relative drop in share of 16%," the Nielsen report states.