Frequencies for first 10,000 rows of minute variable in accident dataset :

 crash time |
   (minute) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        543        5.43        5.43
          1 |        111        1.11        6.54
          2 |         92        0.92        7.46
          3 |        118        1.18        8.64
          4 |        113        1.13        9.77
          5 |        321        3.21       12.98
          6 |        105        1.05       14.03
          7 |        120        1.20       15.23
          8 |        113        1.13       16.36
          9 |        102        1.02       17.38
         10 |        345        3.45       20.83
         11 |         89        0.89       21.72
         12 |        125        1.25       22.97
         13 |        123        1.23       24.20
         14 |         95        0.95       25.15
         15 |        358        3.58       28.73
         16 |         94        0.94       29.67
         17 |        129        1.29       30.96
         18 |        122        1.22       32.18
         19 |        111        1.11       33.29
         20 |        390        3.90       37.19
         21 |         95        0.95       38.14
         22 |        116        1.16       39.30
         23 |        121        1.21       40.51
         24 |        124        1.24       41.75
         25 |        334        3.34       45.09
         26 |        101        1.01       46.10
         27 |        122        1.22       47.32
         28 |        127        1.27       48.59
         29 |        110        1.10       49.69
         30 |        498        4.98       54.67
         31 |         95        0.95       55.62
         32 |        122        1.22       56.84
         33 |        113        1.13       57.97
         34 |        108        1.08       59.05
         35 |        290        2.90       61.95
         36 |        122        1.22       63.17
         37 |        114        1.14       64.31
         38 |        125        1.25       65.56
         39 |        107        1.07       66.63
         40 |        376        3.76       70.39
         41 |        109        1.09       71.48
         42 |        114        1.14       72.62
         43 |        103        1.03       73.65
         44 |        107        1.07       74.72
         45 |        374        3.74       78.46
         46 |        113        1.13       79.59
         47 |        115        1.15       80.74
         48 |        117        1.17       81.91
         49 |        117        1.17       83.08
         50 |        395        3.95       87.03
         51 |        101        1.01       88.04
         52 |        127        1.27       89.31
         53 |         99        0.99       90.30
         54 |        107        1.07       91.37
         55 |        286        2.86       94.23
         56 |        104        1.04       95.27
         57 |        115        1.15       96.42
         58 |        138        1.38       97.80
         59 |        118        1.18       98.98
         99 |        102        1.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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