Frequencies for first 10,000 rows of oral_srgry_sw variable in pos2002 dataset :

 spec: oral |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,212       92.12       92.12
          N |        590        5.90       98.02
          Y |        198        1.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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