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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        812        8.12        8.12
          1 |        357        3.57       11.69
          2 |        121        1.21       12.90
          3 |        620        6.20       19.10
          4 |         66        0.66       19.76
          5 |        127        1.27       21.03
          6 |        447        4.47       25.50
          7 |        134        1.34       26.84
          8 |         57        0.57       27.41
          9 |        732        7.32       34.73
         10 |        132        1.32       36.05
         11 |        462        4.62       40.67
         12 |      4,366       43.66       84.33
         13 |        219        2.19       86.52
         14 |        157        1.57       88.09
         18 |        124        1.24       89.33
         99 |        439        4.39       93.72
          . |        628        6.28      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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