Frequencies for first 10,000 rows of p_crash2 variable in vehicle dataset :

   critical |
    event - |
   precrash |
    (event) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         42        0.42        0.42
          2 |          1        0.01        0.43
          3 |          8        0.08        0.51
          4 |          2        0.02        0.53
          5 |         24        0.24        0.77
          6 |        466        4.66        5.43
          8 |        157        1.57        7.00
          9 |        139        1.39        8.39
         10 |        622        6.22       14.61
         11 |        143        1.43       16.04
         12 |        657        6.57       22.61
         13 |      1,021       10.21       32.82
         14 |         34        0.34       33.16
         15 |        475        4.75       37.91
         16 |         23        0.23       38.14
         17 |        454        4.54       42.68
         18 |          9        0.09       42.77
         19 |         19        0.19       42.96
         50 |        283        2.83       45.79
         51 |        232        2.32       48.11
         52 |         95        0.95       49.06
         53 |        627        6.27       55.33
         54 |        274        2.74       58.07
         55 |         39        0.39       58.46
         56 |          3        0.03       58.49
         59 |          4        0.04       58.53
         60 |        168        1.68       60.21
         61 |        142        1.42       61.63
         62 |      1,095       10.95       72.58
         63 |         30        0.30       72.88
         64 |         38        0.38       73.26
         65 |         18        0.18       73.44
         66 |        400        4.00       77.44
         67 |        127        1.27       78.71
         68 |         15        0.15       78.86
         70 |         13        0.13       78.99
         71 |         16        0.16       79.15
         72 |         34        0.34       79.49
         73 |          7        0.07       79.56
         74 |          4        0.04       79.60
         78 |         10        0.10       79.70
         80 |      1,285       12.85       92.55
         81 |         10        0.10       92.65
         82 |         22        0.22       92.87
         83 |        216        2.16       95.03
         84 |          5        0.05       95.08
         85 |          4        0.04       95.12
         87 |         24        0.24       95.36
         88 |          1        0.01       95.37
         90 |         61        0.61       95.98
         91 |         12        0.12       96.10
         92 |          1        0.01       96.11
         98 |        291        2.91       99.02
         99 |         98        0.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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