Frequencies for first 10,000 rows of op_srvc_cd variable in pos2017 dataset :

  Services: |
 Outpatient |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,569       85.69       85.69
          0 |        336        3.36       89.05
          1 |        928        9.28       98.33
          2 |         43        0.43       98.76
          3 |        124        1.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 9 Jan 2018