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

  PRINCIPAL |
     IMPACT |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        876        8.76        8.76
          1 |        462        4.62       13.38
          2 |        145        1.45       14.83
          3 |        704        7.04       21.87
          4 |        132        1.32       23.19
          5 |        147        1.47       24.66
          6 |        317        3.17       27.83
          7 |        133        1.33       29.16
          8 |        156        1.56       30.72
          9 |        646        6.46       37.18
         10 |        193        1.93       39.11
         11 |        492        4.92       44.03
         12 |      4,260       42.60       86.63
         13 |        107        1.07       87.70
         14 |        272        2.72       90.42
         15 |         26        0.26       90.68
         16 |         11        0.11       90.79
         99 |        124        1.24       92.03
          . |        797        7.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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