The books have collectively sold more than 51 million copies worldwide since the series began seven years ago.

Since then he's published over 50 books which have collectively sold more than a million copies worldwide.

The light novels have collectively sold 1.2 million copies to date.

His first three mixes collectively sold nearly half a million copies.

As of the end of 2012, the series has collectively sold over 15 million copies worldwide.

She has collectively sold over four million records worldwide.

The three recordings have collectively sold more than 750,000 copies to date.

He worked with the group through three albums, which have collectively sold more than 15 million copies.

Rights can be sold either individually or collectively, but they are the main source of income for professional sport in Europe.

The family have collectively sold over 100 million records worldwide.