What do the numbers in the weekly blog statistics e-mail mean?

Weekly e-mail updates for your blog's statistics
Do you know that you have the option to get weekly updates on your blog's statistics via e-mail? If you're not signed up already - you can sign up under Your blogname / Settings / Notifications. Tick the box for Newsletters.

What do the numbers in the weekly statistics update mean?
The numbers that are shown under the icons in your e-mail show the statistics for the passed week. If you see numbers in red unerneath, they show the increase from the previous week.