The Monthly Stats page has been updated to the new look Spacelab screen.  Clicking on a monthly folder, where sends have gone out, results in the following view:

 

 

The right hand side of the screen - using the slider - shows the following additional columns:

 

How can I get this Spacelab view?

Ask your Client Success Manager to enable it for your Role at Admin.Roles.Spacelab Pages.Email Monthly Stats.