
	Years Ended December 31,
Performance Shares	2020		2019		2018
Certified Performance Score	128.2	%	132.7	%	136.7	%
Performance Shares Earned	757,858		792,897		820,780
Performance Shares Mandatorily Deferred as AEP Career Shares	13,614		10,063		11,248
Performance Shares Voluntarily Deferred into the Incentive Compensation Deferral Program	26,936		49,392		56,826
Performance Shares to be Settled (a)	717,308		733,442		752,706

(a)Performance shares settled for the three-year periods ended December 31, 2020 and 2019 settled in AEP common stock. Performance units settled for the three-year period ended December 31, 2018 settled in cash. In all cases, the settlement of common stock or cash occurs in the quarter following the end of the year shown.

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