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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        934        9.34        9.34
          1 |        249        2.49       11.83
          2 |        263        2.63       14.46
          3 |        620        6.20       20.66
          4 |        116        1.16       21.82
          5 |         80        0.80       22.62
          6 |        342        3.42       26.04
          7 |        139        1.39       27.43
          8 |         90        0.90       28.33
          9 |        680        6.80       35.13
         10 |        141        1.41       36.54
         11 |        413        4.13       40.67
         12 |      4,339       43.39       84.06
         13 |        236        2.36       86.42
         14 |        211        2.11       88.53
         99 |        420        4.20       92.73
          . |        727        7.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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