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

     Impact |
Point-Initi |
         al |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        758        7.58        7.58
          1 |        871        8.71       16.29
          2 |        181        1.81       18.10
          3 |        560        5.60       23.70
          4 |         99        0.99       24.69
          5 |         87        0.87       25.56
          6 |        426        4.26       29.82
          7 |        128        1.28       31.10
          8 |        131        1.31       32.41
          9 |        635        6.35       38.76
         10 |        247        2.47       41.23
         11 |      1,011       10.11       51.34
         12 |      4,363       43.63       94.97
         13 |         25        0.25       95.22
         14 |        348        3.48       98.70
         15 |          6        0.06       98.76
         16 |          2        0.02       98.78
         99 |        122        1.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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