Frequencies for first 10,000 rows of orthpdc_srgy_srvc_cd variable in pos2009 dataset :

       SRV: |
 ORTHOPEDIC |
    SURGERY |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,638       86.38       86.38
          0 |      1,162       11.62       98.00
          1 |        155        1.55       99.55
          2 |         25        0.25       99.80
          3 |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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