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

 crash time |
   (minute) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        530        5.30        5.30
          1 |        121        1.21        6.51
          2 |        106        1.06        7.57
          3 |        124        1.24        8.81
          4 |         95        0.95        9.76
          5 |        310        3.10       12.86
          6 |        112        1.12       13.98
          7 |        124        1.24       15.22
          8 |        140        1.40       16.62
          9 |        120        1.20       17.82
         10 |        359        3.59       21.41
         11 |         92        0.92       22.33
         12 |        141        1.41       23.74
         13 |        131        1.31       25.05
         14 |        132        1.32       26.37
         15 |        354        3.54       29.91
         16 |         97        0.97       30.88
         17 |        116        1.16       32.04
         18 |        138        1.38       33.42
         19 |        103        1.03       34.45
         20 |        367        3.67       38.12
         21 |        103        1.03       39.15
         22 |        104        1.04       40.19
         23 |        110        1.10       41.29
         24 |        108        1.08       42.37
         25 |        289        2.89       45.26
         26 |        117        1.17       46.43
         27 |        115        1.15       47.58
         28 |        131        1.31       48.89
         29 |        121        1.21       50.10
         30 |        494        4.94       55.04
         31 |         84        0.84       55.88
         32 |        131        1.31       57.19
         33 |        113        1.13       58.32
         34 |         85        0.85       59.17
         35 |        300        3.00       62.17
         36 |        105        1.05       63.22
         37 |        110        1.10       64.32
         38 |        134        1.34       65.66
         39 |         92        0.92       66.58
         40 |        349        3.49       70.07
         41 |         90        0.90       70.97
         42 |        109        1.09       72.06
         43 |        116        1.16       73.22
         44 |        125        1.25       74.47
         45 |        410        4.10       78.57
         46 |        115        1.15       79.72
         47 |        128        1.28       81.00
         48 |        131        1.31       82.31
         49 |        114        1.14       83.45
         50 |        355        3.55       87.00
         51 |         94        0.94       87.94
         52 |        113        1.13       89.07
         53 |        127        1.27       90.34
         54 |         97        0.97       91.31
         55 |        297        2.97       94.28
         56 |        108        1.08       95.36
         57 |        121        1.21       96.57
         58 |        138        1.38       97.95
         59 |        107        1.07       99.02
         99 |         98        0.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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