Frequencies for first 10,000 rows of retappt variable in namcs2009 dataset :

    return, |
      appt. |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      3,677       36.77       36.77
        yes |      6,323       63.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016