Frequencies for a_eject variable in per_aux dataset :

   Ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        999       92.67       92.67
          2 |         44        4.08       96.75
          3 |         35        3.25      100.00
------------+-----------------------------------
      Total |      1,078      100.00

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