What is the percentage of female patients who started the care plan in 2010?
female patients refers to gender = 'F'; started the care plan in 2010 refers to substr(careplans.START, 1, 4) = '2010'; percentage = MULTIPLY(DIVIDE(COUNT(patients.patient WHERE patients.gender = 'F'), COUNT(patients.patient) WHERE substr(careplans.START, 1, 4) = '2010'), 100);
SELECT CAST(SUM(CASE WHEN T2.gender = 'F' THEN 1 ELSE 0 END) AS REAL) * 100 / COUNT(T1.PATIENT) AS percentage FROM careplans AS T1 INNER JOIN patients AS T2 ON T1.PATIENT = T2.patient WHERE strftime('%Y', T1.START) = '2010'