Help! Need raw data of music sales

[Blackheart]

Does anyone know of any reliable sources for raw data on CD and Online music sales in the U.S. for a wide time period? For my econometrics class project, I'd like to see if I can develop a model that would help explain any trends in sales from year to year.

Thanks in advance for any help!

[eMac4ever]

I think a good website would be http://hitsdailydouble.com/. Just put in anything for the registration. You don't have to put in a valid email.