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

     minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        716        7.16        7.16
          1 |         81        0.81        7.97
          2 |         94        0.94        8.91
          3 |         93        0.93        9.84
          4 |         82        0.82       10.66
          5 |        326        3.26       13.92
          6 |         61        0.61       14.53
          7 |         85        0.85       15.38
          8 |        110        1.10       16.48
          9 |         64        0.64       17.12
         10 |        424        4.24       21.36
         11 |         77        0.77       22.13
         12 |        102        1.02       23.15
         13 |         98        0.98       24.13
         14 |         76        0.76       24.89
         15 |        494        4.94       29.83
         16 |         81        0.81       30.64
         17 |         85        0.85       31.49
         18 |        127        1.27       32.76
         19 |         85        0.85       33.61
         20 |        512        5.12       38.73
         21 |         77        0.77       39.50
         22 |         96        0.96       40.46
         23 |         75        0.75       41.21
         24 |         86        0.86       42.07
         25 |        365        3.65       45.72
         26 |         84        0.84       46.56
         27 |        104        1.04       47.60
         28 |        109        1.09       48.69
         29 |         75        0.75       49.44
         30 |        652        6.52       55.96
         31 |         65        0.65       56.61
         32 |         80        0.80       57.41
         33 |         99        0.99       58.40
         34 |         92        0.92       59.32
         35 |        379        3.79       63.11
         36 |         83        0.83       63.94
         37 |         99        0.99       64.93
         38 |        105        1.05       65.98
         39 |         71        0.71       66.69
         40 |        431        4.31       71.00
         41 |         83        0.83       71.83
         42 |         93        0.93       72.76
         43 |        111        1.11       73.87
         44 |        104        1.04       74.91
         45 |        452        4.52       79.43
         46 |         82        0.82       80.25
         47 |         80        0.80       81.05
         48 |         90        0.90       81.95
         49 |        109        1.09       83.04
         50 |        468        4.68       87.72
         51 |         72        0.72       88.44
         52 |        116        1.16       89.60
         53 |         95        0.95       90.55
         54 |         94        0.94       91.49
         55 |        345        3.45       94.94
         56 |         95        0.95       95.89
         57 |         86        0.86       96.75
         58 |         98        0.98       97.73
         59 |         72        0.72       98.45
         99 |        155        1.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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