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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,249       12.49       12.49
          1 |        291        2.91       15.40
          2 |        132        1.32       16.72
          3 |        521        5.21       21.93
          4 |         76        0.76       22.69
          5 |        105        1.05       23.74
          6 |        448        4.48       28.22
          7 |        109        1.09       29.31
          8 |         81        0.81       30.12
          9 |        732        7.32       37.44
         10 |        131        1.31       38.75
         11 |        331        3.31       42.06
         12 |      4,287       42.87       84.93
         13 |        161        1.61       86.54
         14 |        235        2.35       88.89
         99 |        462        4.62       93.51
          . |        649        6.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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