Frequencies for first 10,000 rows of prov2390 variable in pos2001 dataset :

       srv: |
  physician |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,998       99.98       99.98
          2 |          1        0.01       99.99
          3 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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