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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        804        8.04        8.04
          1 |        338        3.38       11.42
          2 |        109        1.09       12.51
          3 |        649        6.49       19.00
          4 |         54        0.54       19.54
          5 |        109        1.09       20.63
          6 |        406        4.06       24.69
          7 |        119        1.19       25.88
          8 |        116        1.16       27.04
          9 |        663        6.63       33.67
         10 |        175        1.75       35.42
         11 |        357        3.57       38.99
         12 |      4,357       43.57       82.56
         13 |        375        3.75       86.31
         14 |         86        0.86       87.17
         18 |         58        0.58       87.75
         99 |        603        6.03       93.78
          . |        622        6.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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