That's not really true - this is mostly a reflection of there being more and more internet content every year. For example [foo bar] appears to be growing just as much in popularity.

http://www.google.com/views?q=foo+bar+view%3Atimeline&vw...

Thanks. Do you know why the two views are different?

On a related note, I've been growing in popularity at a similar rate.

http://www.google.com/views?q=I+view%3Atimeline&vwdr=Jan...