Frequencies for first 10,000 rows of prov2355 variable in pos2001 dataset :

       srv: |
 outpatient |
    surgery |
       unit |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,837       88.37       88.37
          0 |        542        5.42       93.79
          1 |        573        5.73       99.52
          2 |         28        0.28       99.80
          3 |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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