Frequencies for first 10,000 rows of op_srgry_unit_srvc_cd variable in pos2002 dataset :

       srv: |
 outpatient |
    surgery |
       unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,812       88.12       88.12
          0 |        556        5.56       93.68
          1 |        585        5.85       99.53
          2 |         28        0.28       99.81
          3 |         19        0.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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