Frequencies for first 10,000 rows of ejection variable in person dataset :

   Ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,617       86.17       86.17
          1 |      1,110       11.10       97.27
          2 |        162        1.62       98.89
          9 |        111        1.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016