HMO มี 27% และ POS วางแผน 18% กี่ปี?
How many years have HMOs been 27% and POS plans 18%?
df = pd.DataFrame(columns=['year', 'hmos', 'pos_plans'])
df[(df['hmos'] == '27%') & (df['pos_plans'] == '18%')]['year'].count()