Frequencies for first 10,000 rows of prov2190 variable in pos1997 dataset :

       srv: |
  inpatient |
   surgical |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,792       87.92       87.92
          0 |        404        4.04       91.96
          1 |        748        7.48       99.44
          2 |         42        0.42       99.86
          3 |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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