All plus level users can access "Advanced Analytics" which are a collection of statistics about the number and kinds of assignments created on your account , and the number and type of submissions received.
To access this feature, select the "Analytics" option from the dropdown menu in the top right of the site:
On the next page, you will see the the kinds of assignment types that have been created on your account:
You can also see the number of submission received over different periods of time: