Frequencies for first 10,000 rows of a_eject variable in per_aux dataset :

   Ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,535       85.35       85.35
          2 |      1,396       13.96       99.31
          3 |         69        0.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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