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

 Crash Time |
   (Minute) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        628        6.28        6.28
          1 |        119        1.19        7.47
          2 |        120        1.20        8.67
          3 |        128        1.28        9.95
          4 |        131        1.31       11.26
          5 |        280        2.80       14.06
          6 |         97        0.97       15.03
          7 |        109        1.09       16.12
          8 |        114        1.14       17.26
          9 |        115        1.15       18.41
         10 |        370        3.70       22.11
         11 |         92        0.92       23.03
         12 |        124        1.24       24.27
         13 |         92        0.92       25.19
         14 |        114        1.14       26.33
         15 |        375        3.75       30.08
         16 |        110        1.10       31.18
         17 |        119        1.19       32.37
         18 |        135        1.35       33.72
         19 |        109        1.09       34.81
         20 |        398        3.98       38.79
         21 |         88        0.88       39.67
         22 |        133        1.33       41.00
         23 |        109        1.09       42.09
         24 |        118        1.18       43.27
         25 |        331        3.31       46.58
         26 |        100        1.00       47.58
         27 |        109        1.09       48.67
         28 |        142        1.42       50.09
         29 |        108        1.08       51.17
         30 |        519        5.19       56.36
         31 |         97        0.97       57.33
         32 |        105        1.05       58.38
         33 |        115        1.15       59.53
         34 |        106        1.06       60.59
         35 |        279        2.79       63.38
         36 |         98        0.98       64.36
         37 |         96        0.96       65.32
         38 |        117        1.17       66.49
         39 |        102        1.02       67.51
         40 |        411        4.11       71.62
         41 |         91        0.91       72.53
         42 |        121        1.21       73.74
         43 |         97        0.97       74.71
         44 |        114        1.14       75.85
         45 |        355        3.55       79.40
         46 |        104        1.04       80.44
         47 |        102        1.02       81.46
         48 |        134        1.34       82.80
         49 |         99        0.99       83.79
         50 |        371        3.71       87.50
         51 |         97        0.97       88.47
         52 |        100        1.00       89.47
         53 |        132        1.32       90.79
         54 |         99        0.99       91.78
         55 |        276        2.76       94.54
         56 |         99        0.99       95.53
         57 |        116        1.16       96.69
         58 |        125        1.25       97.94
         59 |        105        1.05       98.99
         99 |        101        1.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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