The data sources used to establish these rankings are IAFD.com and PornHub.com. The initial seed list is generated from PornHub by using the age filter to list all the cougar pornstars older than 40. The top 100 cougar pornstars are extracted. Now the data from IAFD is included for each of these pornstars. Any pornstar that retired earlier than 2015 is removed from the list. This keeps the list current, and more applicable.

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