Frequencies for msr_cd variable in vwhqi_hosp_ed_state dataset :

    Measure |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
      ED_1b |         56       16.67       16.67
      ED_2b |         56       16.67       33.33
     OP_18b |         56       16.67       50.00
      OP_20 |         56       16.67       66.67
      OP_21 |         56       16.67       83.33
      OP_23 |         56       16.67      100.00
------------+-----------------------------------
      Total |        336      100.00

by Jean Roth , jroth@nber.org , 16 Nov 2016