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

   ejection |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,493       74.93       74.93
          1 |        660        6.60       81.53
          2 |        166        1.66       83.19
          3 |         17        0.17       83.36
          7 |         20        0.20       83.56
          8 |      1,584       15.84       99.40
          9 |         60        0.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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