Frequencies for first 10,000 rows of prov2385 variable in pos1999 dataset :

       srv: |
  physician |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,505       95.05       95.05
          1 |        429        4.29       99.34
          2 |         24        0.24       99.58
          3 |         42        0.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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