Frequencies for first 10,000 rows of op_srvc_cd variable in pos2013 dataset :

  Services: |
 Outpatient |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,601       86.01       86.01
          0 |        319        3.19       89.20
          1 |        939        9.39       98.59
          2 |         45        0.45       99.04
          3 |         96        0.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016