Well the problem with trying to counter the argument that piracy is killing the music industry is that we are talking about potential sales that would have happ

Well the problem with trying to counter the argument that piracy is killing the music industry is that we are talking about potential sales that would have happened in a universe where no piracy existed. I doubt the graph will help much. They can still claim that with the trends before 2004 the total revenue should have exceeded $100 billion so they still lost $40 (imaginary) billion.