Frequencies for first 10,000 rows of prov2435 variable in pos2001 dataset :

       srv: |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,267       92.67       92.67
          1 |        144        1.44       94.11
          2 |        578        5.78       99.89
          3 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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