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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        851        8.51        8.51
          1 |        723        7.23       15.74
          2 |        172        1.72       17.46
          3 |        599        5.99       23.45
          4 |         81        0.81       24.26
          5 |        121        1.21       25.47
          6 |        470        4.70       30.17
          7 |        144        1.44       31.61
          8 |         72        0.72       32.33
          9 |        591        5.91       38.24
         10 |        131        1.31       39.55
         11 |        742        7.42       46.97
         12 |      4,118       41.18       88.15
         13 |         23        0.23       88.38
         14 |        290        2.90       91.28
         15 |          4        0.04       91.32
         16 |          1        0.01       91.33
         99 |         69        0.69       92.02
          . |        798        7.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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