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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        891        8.91        8.91
          1 |        597        5.97       14.88
          2 |        166        1.66       16.54
          3 |        671        6.71       23.25
          4 |         85        0.85       24.10
          5 |         90        0.90       25.00
          6 |        310        3.10       28.10
          7 |        128        1.28       29.38
          8 |        125        1.25       30.63
          9 |        630        6.30       36.93
         10 |        197        1.97       38.90
         11 |        697        6.97       45.87
         12 |      4,234       42.34       88.21
         13 |         29        0.29       88.50
         14 |        258        2.58       91.08
         15 |          8        0.08       91.16
         99 |        138        1.38       92.54
          . |        746        7.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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