Frequencies for first 10,000 rows of orthpdc_srgy_srvc_cd variable in pos2007 dataset :

       srv: |
 orthopedic |
    surgery |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,682       86.82       86.82
          0 |      1,211       12.11       98.93
          1 |         91        0.91       99.84
          2 |         10        0.10       99.94
          3 |          6        0.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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