Charting the mytunes revolution

It's taken decades of technology breakthroughs to get from 8-tracks to iPods. Digital downloads still represent just a fraction of total music sales, but CD sales have slid steadily since their introduction. Fortune looks at how the way we listen to music has changed over the years.

1973 total sales: $9,156.1 million
1973 total sales: $9,156.1 million
Bestseller: The World is a Ghetto
War
LPs LPs $6,519.9 million
8-TRACK TAPES 8-TRACK TAPES $2,220.2 million
CASSETTE TAPES CASSETTE TAPES $345.1 million
COMPACT DISCS COMPACT DISCS N/A
MP3 DOWNLOADS MP3 DOWNLOADS N/A
Sources: RIAA, Billboard. All figures in 2007 dollars.
Sales for LPs, cassettes, and CDs include singles
Some music formats are omitted

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