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

     minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        855        8.55        8.55
          1 |         72        0.72        9.27
          2 |         85        0.85       10.12
          3 |         91        0.91       11.03
          4 |         76        0.76       11.79
          5 |        400        4.00       15.79
          6 |         65        0.65       16.44
          7 |         50        0.50       16.94
          8 |         90        0.90       17.84
          9 |         63        0.63       18.47
         10 |        524        5.24       23.71
         11 |         46        0.46       24.17
         12 |        113        1.13       25.30
         13 |         83        0.83       26.13
         14 |         65        0.65       26.78
         15 |        569        5.69       32.47
         16 |         56        0.56       33.03
         17 |         59        0.59       33.62
         18 |         85        0.85       34.47
         19 |         53        0.53       35.00
         20 |        544        5.44       40.44
         21 |         58        0.58       41.02
         22 |         81        0.81       41.83
         23 |         72        0.72       42.55
         24 |         69        0.69       43.24
         25 |        431        4.31       47.55
         26 |         64        0.64       48.19
         27 |         65        0.65       48.84
         28 |         77        0.77       49.61
         29 |         62        0.62       50.23
         30 |        749        7.49       57.72
         31 |         63        0.63       58.35
         32 |         66        0.66       59.01
         33 |         85        0.85       59.86
         34 |         71        0.71       60.57
         35 |        412        4.12       64.69
         36 |         55        0.55       65.24
         37 |         71        0.71       65.95
         38 |         75        0.75       66.70
         39 |         70        0.70       67.40
         40 |        507        5.07       72.47
         41 |         51        0.51       72.98
         42 |         78        0.78       73.76
         43 |         69        0.69       74.45
         44 |         66        0.66       75.11
         45 |        579        5.79       80.90
         46 |         65        0.65       81.55
         47 |         78        0.78       82.33
         48 |         86        0.86       83.19
         49 |         64        0.64       83.83
         50 |        516        5.16       88.99
         51 |         55        0.55       89.54
         52 |         71        0.71       90.25
         53 |        104        1.04       91.29
         54 |         66        0.66       91.95
         55 |        397        3.97       95.92
         56 |         70        0.70       96.62
         57 |         66        0.66       97.28
         58 |        104        1.04       98.32
         59 |         63        0.63       98.95
         99 |        105        1.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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