Frequencies for first 10,000 rows of orthpdc_srgy_srvc_cd variable in pos2011 dataset :

   Services |
  Provided: |
 Orthopedic |
    Surgery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,614       86.14       86.14
          0 |      1,118       11.18       97.32
          1 |        211        2.11       99.43
          2 |         23        0.23       99.66
          3 |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 20 Apr 2019