Frequencies for first 10,000 rows of prov2190 variable in pos1991 dataset :

       srv: |
  inpatient |
   surgical |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,770       87.70       87.70
          0 |        524        5.24       92.94
          1 |        676        6.76       99.70
          2 |         23        0.23       99.93
          3 |          7        0.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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