Frequencies for first 10,000 rows of impact1 variable in person dataset :

    INITIAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        812        8.12        8.12
          1 |        451        4.51       12.63
          2 |        108        1.08       13.71
          3 |        579        5.79       19.50
          4 |         66        0.66       20.16
          5 |        130        1.30       21.46
          6 |        513        5.13       26.59
          7 |        164        1.64       28.23
          8 |         47        0.47       28.70
          9 |        709        7.09       35.79
         10 |        123        1.23       37.02
         11 |        494        4.94       41.96
         12 |      4,333       43.33       85.29
         13 |         90        0.90       86.19
         14 |        277        2.77       88.96
         18 |         60        0.60       89.56
         99 |        416        4.16       93.72
          . |        628        6.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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