Frequencies for first 10,000 rows of prov2435 variable in pos1999 dataset :

       srv: |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,372       93.72       93.72
          1 |        132        1.32       95.04
          2 |        487        4.87       99.91
          3 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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