Frequencies for first 10,000 rows of impact2 variable in person dataset :

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        646        6.46        6.46
          1 |        355        3.55       10.01
          2 |        102        1.02       11.03
          3 |        537        5.37       16.40
          4 |         97        0.97       17.37
          5 |         82        0.82       18.19
          6 |        417        4.17       22.36
          7 |         90        0.90       23.26
          8 |        112        1.12       24.38
          9 |        551        5.51       29.89
         10 |        117        1.17       31.06
         11 |        405        4.05       35.11
         12 |      4,694       46.94       82.05
         13 |        140        1.40       83.45
         14 |        178        1.78       85.23
         18 |         42        0.42       85.65
         99 |        680        6.80       92.45
          . |        755        7.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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