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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        866        8.66        8.66
          1 |        305        3.05       11.71
          2 |        112        1.12       12.83
          3 |        530        5.30       18.13
          4 |         87        0.87       19.00
          5 |         92        0.92       19.92
          6 |        491        4.91       24.83
          7 |         95        0.95       25.78
          8 |        107        1.07       26.85
          9 |        642        6.42       33.27
         10 |         89        0.89       34.16
         11 |        437        4.37       38.53
         12 |      4,432       44.32       82.85
         13 |        110        1.10       83.95
         14 |        143        1.43       85.38
         18 |         39        0.39       85.77
         99 |        758        7.58       93.35
          . |        665        6.65      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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