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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        923        9.23        9.23
          1 |        186        1.86       11.09
          2 |        254        2.54       13.63
          3 |        556        5.56       19.19
          4 |        113        1.13       20.32
          5 |        111        1.11       21.43
          6 |        396        3.96       25.39
          7 |        134        1.34       26.73
          8 |         80        0.80       27.53
          9 |        666        6.66       34.19
         10 |        142        1.42       35.61
         11 |        422        4.22       39.83
         12 |      4,400       44.00       83.83
         13 |        217        2.17       86.00
         14 |        254        2.54       88.54
         99 |        453        4.53       93.07
          . |        693        6.93      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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