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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        414        4.14        4.14
          1 |        730        7.30       11.44
          2 |        237        2.37       13.81
          3 |        857        8.57       22.38
          4 |         59        0.59       22.97
          5 |         96        0.96       23.93
          6 |        314        3.14       27.07
          7 |        157        1.57       28.64
          8 |         66        0.66       29.30
          9 |        663        6.63       35.93
         10 |        111        1.11       37.04
         11 |        875        8.75       45.79
         12 |      4,034       40.34       86.13
         13 |        131        1.31       87.44
         14 |        241        2.41       89.85
         99 |        234        2.34       92.19
          . |        781        7.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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