Frequencies for first 10,000 rows of retappt variable in namcs2005 dataset :

    return, |
      appt. |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,307       43.07       43.07
          1 |      5,693       56.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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