What is the percentage of Hispanic patients who stopped their care plan in 2011?
Hispanic patients refers to ethnicity = 'hispanic'; percentage = MULTIPLY(DIVIDE(COUNT(careplans.PATIENT WHERE ethnicity = 'hispanic'), COUNT(careplans.PATIENT)), 1.0); stopped their care plan in 2011 refers to substr(careplans.stop, 1, 4) = '2011';
SELECT CAST(SUM(CASE WHEN T2.race = 'hispanic' THEN 1 ELSE 0 END) AS REAL) * 100 / COUNT(T1.PATIENT) FROM careplans AS T1 INNER JOIN patients AS T2 ON T1.PATIENT = T2.patient WHERE strftime('%Y', T1.stop) = '2011'