Frequencies for first 10,000 rows of impact1 variable in person dataset :

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,213       22.13       22.13
          1 |      1,348       13.48       35.61
          2 |        171        1.71       37.32
          3 |        546        5.46       42.78
          4 |         47        0.47       43.25
          5 |         43        0.43       43.68
          6 |        287        2.87       46.55
          7 |         60        0.60       47.15
          8 |         39        0.39       47.54
          9 |        571        5.71       53.25
         10 |        139        1.39       54.64
         11 |        490        4.90       59.54
         12 |      3,103       31.03       90.57
         13 |         15        0.15       90.72
         14 |        101        1.01       91.73
         99 |         35        0.35       92.08
          . |        792        7.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016