Oxygene

Oxygene is an album of instrumental electronic composed and produced by Jean Michel Jarre, and released in 1976 on Disques Dreyfuss, licensed to Polydor.

1. Oxygene (Part I)
2. Oxygene (Part II)
3. Oxygene (Part II)
4. Oxygene (Part IV)
5. Oxygene (Part V)
6. Oxygene (Part VI)

In 1997, Jarre produced his album Oxygene 7-13.

According to the sleeve notes, it has apparently sold 55 million copies worldwide. How does this compare with other best selling albums?