Frequencies for first 10,000 rows of prov2385 variable in pos2004 dataset :

       srv: |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,348       93.48       93.48
          1 |        458        4.58       98.06
          2 |        115        1.15       99.21
          3 |         79        0.79      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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