Under the Past Webinar section, you will find all past events, recording links to events, total number of attendee reports, and access to your Webinar Report - Insights.
The initial report in Insights will showcase the total number of registrants over time:
If you scroll down, you'll see the Attendance Summary report with the total number of people who attended and missed the webinar. You'll see the activity on the webinar, registration conversion rate, and the average time during which attendees were in the room and focused:
You will also find a list of Registrants in the People tab. This data is also easily downloadable by using the 'Export' button on the top right to download a full CSV report: