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

 spec: foot |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,212       92.12       92.12
          N |        482        4.82       96.94
          Y |        306        3.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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