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

 spec: foot |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,683       96.83       96.83
          N |        177        1.77       98.60
          Y |        140        1.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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