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

   Ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,535       85.35       85.35
          1 |      1,213       12.13       97.48
          2 |        183        1.83       99.31
          9 |         69        0.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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