Frequencies for first 10,000 rows of oral_srgry_sw variable in pos1991 dataset :

 spec: oral |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,683       96.83       96.83
          N |        214        2.14       98.97
          Y |        103        1.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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