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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        735        7.35        7.35
          1 |        994        9.94       17.29
          2 |        141        1.41       18.70
          3 |        596        5.96       24.66
          4 |         87        0.87       25.53
          5 |        127        1.27       26.80
          6 |        387        3.87       30.67
          7 |        154        1.54       32.21
          8 |        124        1.24       33.45
          9 |        627        6.27       39.72
         10 |        192        1.92       41.64
         11 |        970        9.70       51.34
         12 |      4,350       43.50       94.84
         13 |         33        0.33       95.17
         14 |        374        3.74       98.91
         15 |          8        0.08       98.99
         16 |          2        0.02       99.01
         99 |         99        0.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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