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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        910        9.10        9.10
          1 |        850        8.50       17.60
          2 |        159        1.59       19.19
          3 |        542        5.42       24.61
          4 |         66        0.66       25.27
          5 |        101        1.01       26.28
          6 |        360        3.60       29.88
          7 |        120        1.20       31.08
          8 |         89        0.89       31.97
          9 |        550        5.50       37.47
         10 |        146        1.46       38.93
         11 |        803        8.03       46.96
         12 |      4,043       40.43       87.39
         13 |         22        0.22       87.61
         14 |        349        3.49       91.10
         15 |         11        0.11       91.21
         16 |          1        0.01       91.22
         99 |         58        0.58       91.80
          . |        820        8.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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