Frequencies for first 10,000 rows of prov2355 variable in pos2004 dataset :

       srv: |
 outpatient |
    surgery |
       unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,766       87.66       87.66
          0 |        578        5.78       93.44
          1 |        602        6.02       99.46
          2 |         37        0.37       99.83
          3 |         17        0.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 26 Jan 2016