Email option of just members who have paid something in the last ____ months

We have 9,000 guests and paid members in our account. When sending an email, the "Active Accounts" option only decreases the list by a few. I'm guessing we have 2,000 guest members who live out of the area, have only played once or twice, and may never play again. It would be beneficial to filter the email by accounts that have paid something in the last 3, 6 or 12 months.