What is the membership data?
Jim, Welcome CiviCRM SE. You can use membership search to find membership data or reports.

Search:
CiviCRM >> Membership >> Find Memberships.

Reports:
CiviCRM >> Reports >> Membership Reports. 

Doc:
https://docs.civicrm.org/user/en/latest/membership/what-is-civimember/

Cheers

Pradeep