The RIAA has put on its website its 2007 U.S. Manufacturers' Unit Shipments and Value Chart. (Though not manufactured in a typical sense, mobile and digital downloads are included.) (Download PDF file of the statistics.) I don't want to ruin all the fun, but I'll put a few of the numbers here. Values were calculated at recommended or estimated list price.

• CD shipments (net) dropped 17.5% while the dollar value of those shipments dropped 20.5%.
• The LP/EP category (vinyl records) saw shipments increase 36.6% with a 46.2% increase in dollar value.
• Cassette shipments (net) dropped 41.2% with, oddly, only a 18.4% drop in dollar value.
• Kiosk downloads increased 28.5% by units and 38.1% by dollar value.
• Subscriptions to music services (using a weighted annual average) increased a mere 0.7% while their dollar value dropped 2.6%.
• Mobile increased 14.6% by units and by 13.6% by dollar value. Mobile includes master ringtones, ringbacks, music videos, full track downloads and "other mobile."