But the percentage changes are correct, aren't they? I don't think readers will think that the graphs represents absolute popularity, also (IMO) any survey take

But the percentage changes are correct, aren't they? I don't think readers will think that the graphs represents absolute popularity, also (IMO) any survey taken by a company will be used for marketing purposes and should be consumed as such. (It's just some text on the internet, nobody is going to take it as gospel.)