Frequencies for first 10,000 rows of impact2 variable in person dataset :

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        878        8.78        8.78
          1 |        446        4.46       13.24
          2 |        183        1.83       15.07
          3 |        693        6.93       22.00
          4 |        117        1.17       23.17
          5 |        114        1.14       24.31
          6 |        266        2.66       26.97
          7 |        121        1.21       28.18
          8 |        151        1.51       29.69
          9 |        738        7.38       37.07
         10 |        178        1.78       38.85
         11 |        575        5.75       44.60
         12 |      4,190       41.90       86.50
         13 |        159        1.59       88.09
         14 |        289        2.89       90.98
         15 |         37        0.37       91.35
         16 |          9        0.09       91.44
         99 |        113        1.13       92.57
          . |        743        7.43      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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