Frequencies for first 10,000 rows of ip_srgcl_srvc_cd variable in pos2010 dataset :

       SRV: |
   SURGICAL |
SERVICES-IN |
    PATIENT |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,626       86.26       86.26
          0 |        479        4.79       91.05
          1 |        817        8.17       99.22
          2 |         47        0.47       99.69
          3 |         31        0.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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