GoContractor provides several reports that provide the lifetime history of your users and the course history status. As an admin, you can download the course history report to an excel worksheet and manipulate the data to your needs to find the number you need such as the course completed in a date range or percent of courses completed so far.
For a visual walkthrough of how to create a report, please click the link below:
How to Access Reports In GoContractor Tutorial
To see how to do this please see our Course History article.