Frequencies for first 10,000 rows of prov3425 variable in pos2009 dataset :

       SRV: |
DENTAL-ONSI |
TE-RESIDENT |
          S |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,657       76.57       76.57
          N |        723        7.23       83.80
          Y |      1,620       16.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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