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

   Ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,936       49.36       49.36
          1 |      1,343       13.43       62.79
          2 |        165        1.65       64.44
          9 |      3,556       35.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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