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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        545        5.45        5.45
          1 |        495        4.95       10.40
          2 |        306        3.06       13.46
          3 |        885        8.85       22.31
          4 |         63        0.63       22.94
          5 |        104        1.04       23.98
          6 |        292        2.92       26.90
          7 |        123        1.23       28.13
          8 |         46        0.46       28.59
          9 |        729        7.29       35.88
         10 |        114        1.14       37.02
         11 |        713        7.13       44.15
         12 |      4,038       40.38       84.53
         13 |         54        0.54       85.07
         14 |        436        4.36       89.43
         99 |        179        1.79       91.22
          . |        878        8.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016