Frequencies for first 10,000 rows of oral_srgry_sw variable in pos1992 dataset :

 spec: oral |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,640       96.40       96.40
          N |        247        2.47       98.87
          Y |        113        1.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017