Frequencies for first 10,000 rows of prov2355 variable in pos1993 dataset :

       srv: |
 outpatient |
    surgery |
       unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,856       88.56       88.56
          0 |        523        5.23       93.79
          1 |        585        5.85       99.64
          2 |         26        0.26       99.90
          3 |         10        0.10      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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