Frequencies for first 10,000 rows of orthpdc_srgy_srvc_cd variable in pos2018 dataset :

  Services: |
 Orthopedic |
    Surgery |
       Code |      Freq.     Percent        Cum.
------------+-----------------------------------
          . |      8,560       85.60       85.60
          0 |      1,013       10.13       95.73
          1 |        319        3.19       98.92
          2 |         35        0.35       99.27
          3 |         73        0.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 15 Feb 2019