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

     minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        717        7.17        7.17
          1 |         98        0.98        8.15
          2 |        104        1.04        9.19
          3 |         85        0.85       10.04
          4 |         88        0.88       10.92
          5 |        368        3.68       14.60
          6 |         83        0.83       15.43
          7 |         91        0.91       16.34
          8 |        102        1.02       17.36
          9 |         65        0.65       18.01
         10 |        455        4.55       22.56
         11 |         64        0.64       23.20
         12 |         92        0.92       24.12
         13 |         71        0.71       24.83
         14 |         93        0.93       25.76
         15 |        533        5.33       31.09
         16 |         62        0.62       31.71
         17 |         90        0.90       32.61
         18 |         97        0.97       33.58
         19 |         71        0.71       34.29
         20 |        514        5.14       39.43
         21 |         72        0.72       40.15
         22 |         78        0.78       40.93
         23 |        111        1.11       42.04
         24 |         79        0.79       42.83
         25 |        410        4.10       46.93
         26 |         76        0.76       47.69
         27 |         88        0.88       48.57
         28 |        100        1.00       49.57
         29 |         82        0.82       50.39
         30 |        681        6.81       57.20
         31 |         57        0.57       57.77
         32 |         79        0.79       58.56
         33 |         81        0.81       59.37
         34 |         82        0.82       60.19
         35 |        398        3.98       64.17
         36 |         68        0.68       64.85
         37 |         89        0.89       65.74
         38 |         76        0.76       66.50
         39 |         69        0.69       67.19
         40 |        485        4.85       72.04
         41 |         68        0.68       72.72
         42 |        101        1.01       73.73
         43 |         84        0.84       74.57
         44 |         84        0.84       75.41
         45 |        516        5.16       80.57
         46 |         76        0.76       81.33
         47 |         88        0.88       82.21
         48 |         90        0.90       83.11
         49 |         75        0.75       83.86
         50 |        513        5.13       88.99
         51 |         66        0.66       89.65
         52 |         85        0.85       90.50
         53 |        100        1.00       91.50
         54 |         68        0.68       92.18
         55 |        356        3.56       95.74
         56 |         81        0.81       96.55
         57 |         82        0.82       97.37
         58 |         89        0.89       98.26
         59 |         66        0.66       98.92
         99 |        108        1.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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