Frequencies for first 10,000 rows of prov3425 variable in pos2004 dataset :

       srv: |
dental-onsi |
te-resident |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,489       74.89       74.89
          N |        678        6.78       81.67
          Y |      1,833       18.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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