Frequencies for swim_ool variable in fmli011 dataset :

   swim_ool |      Freq.     Percent        Cum.
------------+-----------------------------------
          A |      6,843       88.73       88.73
          D |        869       11.27      100.00
------------+-----------------------------------
      Total |      7,712      100.00

by Jean Roth , jroth@nber.org , 17 Mar 2016