Frequencies for measureid variable in hqi_state_comp dataset :

               Measure ID |      Freq.     Percent        Cum.
--------------------------+-----------------------------------
            COMP_HIP_KNEE |         56       14.29       14.29
PSI_12_POSTOP_PULMEMB_DVT |         56       14.29       28.57
      PSI_14_POSTOP_DEHIS |         56       14.29       42.86
           PSI_15_ACC_LAC |         56       14.29       57.14
          PSI_4_SURG_COMP |         56       14.29       71.43
            PSI_6_IAT_PTX |         56       14.29       85.71
            PSI_90_SAFETY |         56       14.29      100.00
--------------------------+-----------------------------------
                    Total |        392      100.00

by Jean Roth , jroth@nber.org , 15 Nov 2016