Frequencies for first 10,000 rows of oral_srgry_sw variable in pos2008 dataset :

 spec: oral |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,650       96.50       96.50
          N |        263        2.63       99.13
          Y |         87        0.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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