Frequencies for first 10,000 rows of prov2435 variable in pos2005 dataset :

       srv: |
  radiology |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,323       93.23       93.23
          1 |        148        1.48       94.71
          2 |        504        5.04       99.75
          3 |         25        0.25      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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