They seem to have had a boost in the last 5 years as they embraced the Internet but it looks like things are now starting to wane.
That's the number of searchs for using the google search engine (not actual website visits)
Therefore it probably just shows that people are getting much more savvy with their internet use and learning how to do a direct type in for the website they want, rather than typing it into google first, then clicking a link. Or maybe now people are much more used to using a bookmark too.
Of course that now means that dubs are much less likely to see 'other' sites as they're not searching in the first place, they're going direct - which was likely the goal of the GB by going with an easy and very short domain name.
Oh, and of course, the increased use of the QR code.