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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,168       11.68       11.68
          1 |        352        3.52       15.20
          2 |        130        1.30       16.50
          3 |        615        6.15       22.65
          4 |         81        0.81       23.46
          5 |        128        1.28       24.74
          6 |        470        4.70       29.44
          7 |        115        1.15       30.59
          8 |        119        1.19       31.78
          9 |        648        6.48       38.26
         10 |        148        1.48       39.74
         11 |        305        3.05       42.79
         12 |      4,389       43.89       86.68
         13 |         71        0.71       87.39
         14 |        192        1.92       89.31
         99 |        438        4.38       93.69
          . |        631        6.31      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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