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

     minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        841        8.41        8.41
          1 |         74        0.74        9.15
          2 |         80        0.80        9.95
          3 |         84        0.84       10.79
          4 |         61        0.61       11.40
          5 |        419        4.19       15.59
          6 |         66        0.66       16.25
          7 |         56        0.56       16.81
          8 |         68        0.68       17.49
          9 |         60        0.60       18.09
         10 |        497        4.97       23.06
         11 |         59        0.59       23.65
         12 |         92        0.92       24.57
         13 |         74        0.74       25.31
         14 |         64        0.64       25.95
         15 |        642        6.42       32.37
         16 |         62        0.62       32.99
         17 |         76        0.76       33.75
         18 |         80        0.80       34.55
         19 |         65        0.65       35.20
         20 |        551        5.51       40.71
         21 |         64        0.64       41.35
         22 |         59        0.59       41.94
         23 |         67        0.67       42.61
         24 |         70        0.70       43.31
         25 |        410        4.10       47.41
         26 |         66        0.66       48.07
         27 |         62        0.62       48.69
         28 |         80        0.80       49.49
         29 |         50        0.50       49.99
         30 |        859        8.59       58.58
         31 |         51        0.51       59.09
         32 |         72        0.72       59.81
         33 |         62        0.62       60.43
         34 |         61        0.61       61.04
         35 |        436        4.36       65.40
         36 |         54        0.54       65.94
         37 |         66        0.66       66.60
         38 |         72        0.72       67.32
         39 |         54        0.54       67.86
         40 |        523        5.23       73.09
         41 |         54        0.54       73.63
         42 |         82        0.82       74.45
         43 |         70        0.70       75.15
         44 |         62        0.62       75.77
         45 |        623        6.23       82.00
         46 |         43        0.43       82.43
         47 |         66        0.66       83.09
         48 |         69        0.69       83.78
         49 |         53        0.53       84.31
         50 |        583        5.83       90.14
         51 |         39        0.39       90.53
         52 |         72        0.72       91.25
         53 |         76        0.76       92.01
         54 |         69        0.69       92.70
         55 |        390        3.90       96.60
         56 |         56        0.56       97.16
         57 |         62        0.62       97.78
         58 |         78        0.78       98.56
         59 |         55        0.55       99.11
         99 |         89        0.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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