Frequencies for first 10,000 rows of op_srgry_unit_srvc_cd variable in pos2003 dataset :

       srv: |
 outpatient |
    surgery |
       unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,789       87.89       87.89
          0 |        557        5.57       93.46
          1 |        603        6.03       99.49
          2 |         31        0.31       99.80
          3 |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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