The Subscriptions service (part of the Subscription Management application) contains the following report:

Subscription Distribution Report

The Subscription Distribution report is a graphical representation of current subscriptions grouped by their respective distribution types (i.e., Hard Shipment, Email, Fax, Drop Ship Product). It also supports a drill down option to view information about the records that comprise each area of the pie chart.

The Subscription Distribution report is found under the Report Wizard's General tab.