Frequencies for first 10,000 rows of prov3280 variable in pos1999 dataset :

       srv: |
physician-o |
  nsite-non |
   resident |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,387       73.87       73.87
          N |      2,545       25.45       99.32
          Y |         68        0.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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