The View Forum Stats option within the Forum tool provides a range of data for 'Top 10' statistics, as well as a 'Forum Stats' graph outlining total posts and topics (monthly + total).
This article provides instructions on how to view these stats. See below:
1. Go to 'Communication → Forum'
2. Click on the "View Forum Stats" link
Once the page loads, you will see a range of 'Top 10' data, as well as a Forum Stats graph - as per below: