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

   ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,347       83.47       83.47
          1 |      1,236       12.36       95.83
          2 |        223        2.23       98.06
          9 |        194        1.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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