Frequencies for first 10,000 rows of op_srgry_unit_srvc_cd variable in pos2005 dataset :

       srv: |
 outpatient |
    surgery |
       unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,731       87.31       87.31
          0 |        585        5.85       93.16
          1 |        628        6.28       99.44
          2 |         39        0.39       99.83
          3 |         17        0.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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