Frequencies for first 10,000 rows of prov2435 variable in pos2006 dataset :

       srv: |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,531       95.31       95.31
          1 |        101        1.01       96.32
          2 |        344        3.44       99.76
          3 |         24        0.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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