Frequencies for first 10,000 rows of prov2385 variable in pos1996 dataset :

       srv: |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,560       95.60       95.60
          1 |        394        3.94       99.54
          2 |         19        0.19       99.73
          3 |         27        0.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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