These are only using RIAA certificates. We will add data for other certificates in the future. This exclude greatest hits albums unless the album had a new song in it. We try to keep the songs on the site unique, therefore so will the albums. So don't use this as an aggregate total of sales. Thanks!
Note: This is using data we have added to the site manually, we will continue adding more data in the future.Sales - Platinum is 1,000,000 sales. Diamond is 10,000,000 sales.