SanJ,
Without the data in the database there is no information to analyze. What could be done is an extra process added after removal takes place. This process could insert the date, list number and seq # of users into a custom table as they are removed. Then, a custom script or query could read this data. It may be easier to turn "Keep removed users in database" on and then manually (or with a script) delete some or all removed users on demand or on a schedule.