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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,056       10.56       10.56
          1 |        581        5.81       16.37
          2 |        166        1.66       18.03
          3 |        613        6.13       24.16
          4 |         46        0.46       24.62
          5 |         78        0.78       25.40
          6 |        358        3.58       28.98
          7 |        105        1.05       30.03
          8 |         70        0.70       30.73
          9 |        651        6.51       37.24
         10 |        136        1.36       38.60
         11 |        753        7.53       46.13
         12 |      4,305       43.05       89.18
         13 |         19        0.19       89.37
         14 |        218        2.18       91.55
         15 |         11        0.11       91.66
         16 |          3        0.03       91.69
         99 |         55        0.55       92.24
          . |        776        7.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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