Frequencies for first 10,000 rows of orthpdc_srgy_srvc_cd variable in pos2008 dataset :

       srv: |
 orthopedic |
    surgery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,655       86.55       86.55
          0 |      1,201       12.01       98.56
          1 |        116        1.16       99.72
          2 |         18        0.18       99.90
          3 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017