Frequencies for first 10,000 rows of prov2440 variable in pos2000 dataset :

       srv: |
  radiology |
(diagnostic |
          ) |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,871       88.71       88.71
          0 |         18        0.18       88.89
          1 |        814        8.14       97.03
          2 |        192        1.92       98.95
          3 |        105        1.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017