It's US music industry sales data, so there's no reason to believe it applies _directly_ to Germany. Also that's revenue. I didn't check, but isn't Compact Di

It's US music industry sales data, so there's no reason to believe it applies _directly_ to Germany. Also that's revenue. I didn't check, but isn't Compact Disc an industry standard and registered trademark, that required payment? So, there would be revenue associated with hardware sales which would front load the figures?? That chart needs an overall revenue area, and an items sold overlay to make it really useful.