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

 crash time |
   (minute) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        528        5.28        5.28
          1 |        103        1.03        6.31
          2 |        114        1.14        7.45
          3 |        104        1.04        8.49
          4 |        117        1.17        9.66
          5 |        294        2.94       12.60
          6 |         89        0.89       13.49
          7 |        113        1.13       14.62
          8 |        137        1.37       15.99
          9 |        105        1.05       17.04
         10 |        319        3.19       20.23
         11 |        100        1.00       21.23
         12 |        139        1.39       22.62
         13 |        105        1.05       23.67
         14 |        129        1.29       24.96
         15 |        392        3.92       28.88
         16 |        124        1.24       30.12
         17 |        117        1.17       31.29
         18 |        133        1.33       32.62
         19 |        107        1.07       33.69
         20 |        350        3.50       37.19
         21 |         90        0.90       38.09
         22 |        107        1.07       39.16
         23 |        107        1.07       40.23
         24 |        126        1.26       41.49
         25 |        311        3.11       44.60
         26 |        118        1.18       45.78
         27 |         97        0.97       46.75
         28 |        117        1.17       47.92
         29 |        115        1.15       49.07
         30 |        504        5.04       54.11
         31 |         99        0.99       55.10
         32 |         96        0.96       56.06
         33 |        107        1.07       57.13
         34 |        116        1.16       58.29
         35 |        322        3.22       61.51
         36 |        127        1.27       62.78
         37 |        118        1.18       63.96
         38 |        137        1.37       65.33
         39 |        137        1.37       66.70
         40 |        355        3.55       70.25
         41 |        123        1.23       71.48
         42 |         93        0.93       72.41
         43 |        130        1.30       73.71
         44 |        104        1.04       74.75
         45 |        380        3.80       78.55
         46 |        119        1.19       79.74
         47 |        126        1.26       81.00
         48 |        115        1.15       82.15
         49 |        100        1.00       83.15
         50 |        373        3.73       86.88
         51 |         88        0.88       87.76
         52 |        128        1.28       89.04
         53 |        142        1.42       90.46
         54 |        101        1.01       91.47
         55 |        290        2.90       94.37
         56 |        120        1.20       95.57
         57 |        103        1.03       96.60
         58 |        148        1.48       98.08
         59 |         95        0.95       99.03
         99 |         97        0.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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