Why not last year? They don't have data for it?
This is the only reason I still have to go back to Google a lot. When I'm searching for some programming language help/tutorial, I mostly use the last year (!gyear in DuckDuckGo to take you to google with 1 year search), since I don't want to be seeing how to do implement something for my app in Android 1.6 or Python 2.0 (for instance).