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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,066       10.66       10.66
          1 |        738        7.38       18.04
          2 |        121        1.21       19.25
          3 |        629        6.29       25.54
          4 |         39        0.39       25.93
          5 |         81        0.81       26.74
          6 |        329        3.29       30.03
          7 |        130        1.30       31.33
          8 |         65        0.65       31.98
          9 |        620        6.20       38.18
         10 |        104        1.04       39.22
         11 |        711        7.11       46.33
         12 |      4,209       42.09       88.42
         13 |         11        0.11       88.53
         14 |        209        2.09       90.62
         15 |          2        0.02       90.64
         99 |         61        0.61       91.25
          . |        875        8.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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