Frequencies for first 10,000 rows of retappt variable in namcs2011 dataset :

    Return, |
      appt. |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      3,853       38.53       38.53
        Yes |      6,147       61.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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