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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        908        9.08        9.08
          1 |        695        6.95       16.03
          2 |        130        1.30       17.33
          3 |        598        5.98       23.31
          4 |         89        0.89       24.20
          5 |         94        0.94       25.14
          6 |        319        3.19       28.33
          7 |        149        1.49       29.82
          8 |         99        0.99       30.81
          9 |        530        5.30       36.11
         10 |        176        1.76       37.87
         11 |        732        7.32       45.19
         12 |      4,280       42.80       87.99
         13 |         29        0.29       88.28
         14 |        253        2.53       90.81
         15 |         10        0.10       90.91
         16 |          3        0.03       90.94
         99 |         85        0.85       91.79
          . |        821        8.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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