Frequencies for a_eject variable in per_aux dataset :

   Ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,414       95.15       95.15
          2 |         27        1.82       96.97
          3 |         45        3.03      100.00
------------+-----------------------------------
      Total |      1,486      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016