The clear implication being that there is really no loss from piracy. While this point could be argued, these numbers show nothing.
First off, we don't know how much money would have been made had there been no piracy - that is, the music industry might have made even more money every year.
The other issue is that while the music industry's worldwide revenues have increased, recorded music revenues have actually decreased, with North American revenues falling from $13 billion in 2007 to $12.6 billion in 2010, and worldwide revenues falling from $35.4 billion in 2009 to $35.1 billion in 2010.
Of course, by that same note it can't simply be claimed that the loss is because of piracy. It may be that people are simply buying less music.