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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        933        9.33        9.33
          1 |        641        6.41       15.74
          2 |        281        2.81       18.55
          3 |        679        6.79       25.34
          4 |         31        0.31       25.65
          5 |         56        0.56       26.21
          6 |        285        2.85       29.06
          7 |         92        0.92       29.98
          8 |         71        0.71       30.69
          9 |        620        6.20       36.89
         10 |        216        2.16       39.05
         11 |        836        8.36       47.41
         12 |      3,936       39.36       86.77
         13 |         34        0.34       87.11
         14 |        407        4.07       91.18
         99 |         20        0.20       91.38
          . |        862        8.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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