This issue has taken on a bit more prominence, as there's been differences of opinion over whether there should be a 'weeks on chart' column attached as well. My own view is that there's actually too much information here as it is, and that lots of it is too US-centric. I think there's two ways the article could move forward: 

 (a) Remove all the sales and certifications columns, and simply leave the chart positions. This would lead to less vandalism (sales figures on this article are changed daily to unsourced numbers) and make the article less prone to sourcing disputes. The removed data is reproduced in each album's own entry or in the article on MC certifications, which seems more appropriate. I'd personally favour this approach. 

 (b) Merge the tabular data from the MC certifications article into this one, so it maintained sales and cert data for the US, but also included (properly sourced) information for other reasons, to reduce the US bias in the listing.  

 Thoughts?