Frequencies for first 10,000 rows of prov3425 variable in pos2007 dataset :

       srv: |
dental-onsi |
te-resident |
          s |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,522       75.22       75.22
          N |        741        7.41       82.63
          Y |      1,737       17.37      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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