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

   ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,502       85.02       85.02
          1 |      1,100       11.00       96.02
          2 |        239        2.39       98.41
          9 |        159        1.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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