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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        852        8.52        8.52
          1 |        746        7.46       15.98
          2 |        175        1.75       17.73
          3 |        513        5.13       22.86
          4 |         75        0.75       23.61
          5 |        122        1.22       24.83
          6 |        327        3.27       28.10
          7 |        120        1.20       29.30
          8 |        136        1.36       30.66
          9 |        483        4.83       35.49
         10 |        161        1.61       37.10
         11 |        905        9.05       46.15
         12 |      4,200       42.00       88.15
         13 |         31        0.31       88.46
         14 |        266        2.66       91.12
         99 |         92        0.92       92.04
          . |        796        7.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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