Frequencies for first 10,000 rows of prov2385 variable in pos2006 dataset :

       srv: |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,270       92.70       92.70
          1 |        511        5.11       97.81
          2 |        135        1.35       99.16
          3 |         84        0.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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