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

   critical |
    event - |
   precrash |
    (event) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         84        0.84        0.84
          2 |          1        0.01        0.85
          3 |          7        0.07        0.92
          4 |          2        0.02        0.94
          5 |         37        0.37        1.31
          6 |        458        4.58        5.89
          8 |        119        1.19        7.08
          9 |        179        1.79        8.87
         10 |        598        5.98       14.85
         11 |        144        1.44       16.29
         12 |        743        7.43       23.72
         13 |      1,132       11.32       35.04
         14 |         34        0.34       35.38
         15 |        459        4.59       39.97
         16 |         24        0.24       40.21
         17 |        511        5.11       45.32
         18 |          7        0.07       45.39
         19 |          9        0.09       45.48
         50 |        234        2.34       47.82
         51 |        225        2.25       50.07
         52 |        100        1.00       51.07
         53 |        530        5.30       56.37
         54 |        246        2.46       58.83
         55 |         20        0.20       59.03
         56 |          5        0.05       59.08
         59 |          4        0.04       59.12
         60 |        150        1.50       60.62
         61 |        147        1.47       62.09
         62 |      1,068       10.68       72.77
         63 |         24        0.24       73.01
         64 |         46        0.46       73.47
         65 |         19        0.19       73.66
         66 |        412        4.12       77.78
         67 |         95        0.95       78.73
         68 |          7        0.07       78.80
         70 |          8        0.08       78.88
         71 |         13        0.13       79.01
         72 |         33        0.33       79.34
         73 |          3        0.03       79.37
         74 |          5        0.05       79.42
         78 |          6        0.06       79.48
         80 |      1,223       12.23       91.71
         81 |         11        0.11       91.82
         82 |         10        0.10       91.92
         83 |        239        2.39       94.31
         84 |          6        0.06       94.37
         85 |          3        0.03       94.40
         87 |         34        0.34       94.74
         88 |          1        0.01       94.75
         89 |          2        0.02       94.77
         90 |         68        0.68       95.45
         91 |          8        0.08       95.53
         92 |          1        0.01       95.54
         98 |        366        3.66       99.20
         99 |         80        0.80      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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