Frequencies for first 10,000 rows of retappt variable in namcs2002 dataset :

  Return at |
  specified |
       time |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      3,756       37.56       37.56
        Yes |      6,244       62.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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