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

 spec: foot |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,640       96.40       96.40
          N |        199        1.99       98.39
          Y |        161        1.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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