How many students graduated from Central Alabama Community College in 2011 in total?
Central Alabama Community College refers to chronname = 'Central Alabama Community College'; in 2011 refers to year = 2011;
SELECT T2.grad_cohort FROM institution_details AS T1 INNER JOIN institution_grads AS T2 ON T1.unitid = T2.unitid WHERE T1.chronname = 'Central Alabama Community College' AND T2.year = 2011