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

   Critical |
    Event - |
   Precrash |
    (Event) |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         81        0.81        0.81
          3 |          8        0.08        0.89
          4 |          3        0.03        0.92
          5 |         87        0.87        1.79
          6 |        516        5.16        6.95
          8 |        148        1.48        8.43
          9 |        135        1.35        9.78
         10 |        633        6.33       16.11
         11 |        134        1.34       17.45
         12 |        751        7.51       24.96
         13 |      1,092       10.92       35.88
         14 |         34        0.34       36.22
         15 |        453        4.53       40.75
         16 |         21        0.21       40.96
         17 |        493        4.93       45.89
         18 |         20        0.20       46.09
         19 |          7        0.07       46.16
         50 |        255        2.55       48.71
         51 |        253        2.53       51.24
         52 |         75        0.75       51.99
         53 |        518        5.18       57.17
         54 |        248        2.48       59.65
         55 |         67        0.67       60.32
         56 |         10        0.10       60.42
         59 |          8        0.08       60.50
         60 |        166        1.66       62.16
         61 |        156        1.56       63.72
         62 |      1,021       10.21       73.93
         63 |         29        0.29       74.22
         64 |         49        0.49       74.71
         65 |         25        0.25       74.96
         66 |        508        5.08       80.04
         67 |        144        1.44       81.48
         68 |          5        0.05       81.53
         70 |          8        0.08       81.61
         71 |         17        0.17       81.78
         72 |         26        0.26       82.04
         73 |          2        0.02       82.06
         74 |          6        0.06       82.12
         78 |         16        0.16       82.28
         80 |      1,170       11.70       93.98
         81 |         13        0.13       94.11
         82 |         14        0.14       94.25
         83 |        186        1.86       96.11
         84 |          4        0.04       96.15
         85 |          2        0.02       96.17
         87 |         34        0.34       96.51
         90 |         53        0.53       97.04
         91 |          3        0.03       97.07
         98 |        207        2.07       99.14
         99 |         86        0.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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