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

     minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        665        6.65        6.65
          1 |         90        0.90        7.55
          2 |         77        0.77        8.32
          3 |         90        0.90        9.22
          4 |        110        1.10       10.32
          5 |        367        3.67       13.99
          6 |         63        0.63       14.62
          7 |         90        0.90       15.52
          8 |        108        1.08       16.60
          9 |         87        0.87       17.47
         10 |        406        4.06       21.53
         11 |         64        0.64       22.17
         12 |        114        1.14       23.31
         13 |         93        0.93       24.24
         14 |        104        1.04       25.28
         15 |        444        4.44       29.72
         16 |         65        0.65       30.37
         17 |         97        0.97       31.34
         18 |        113        1.13       32.47
         19 |         86        0.86       33.33
         20 |        481        4.81       38.14
         21 |         81        0.81       38.95
         22 |         92        0.92       39.87
         23 |        102        1.02       40.89
         24 |        110        1.10       41.99
         25 |        371        3.71       45.70
         26 |         68        0.68       46.38
         27 |         92        0.92       47.30
         28 |         90        0.90       48.20
         29 |         85        0.85       49.05
         30 |        625        6.25       55.30
         31 |         65        0.65       55.95
         32 |         87        0.87       56.82
         33 |         85        0.85       57.67
         34 |         89        0.89       58.56
         35 |        372        3.72       62.28
         36 |         71        0.71       62.99
         37 |        117        1.17       64.16
         38 |         91        0.91       65.07
         39 |         83        0.83       65.90
         40 |        426        4.26       70.16
         41 |         80        0.80       70.96
         42 |         96        0.96       71.92
         43 |        106        1.06       72.98
         44 |         90        0.90       73.88
         45 |        476        4.76       78.64
         46 |         71        0.71       79.35
         47 |         96        0.96       80.31
         48 |        115        1.15       81.46
         49 |         86        0.86       82.32
         50 |        460        4.60       86.92
         51 |         77        0.77       87.69
         52 |         89        0.89       88.58
         53 |        117        1.17       89.75
         54 |        102        1.02       90.77
         55 |        394        3.94       94.71
         56 |         83        0.83       95.54
         57 |         94        0.94       96.48
         58 |        120        1.20       97.68
         59 |        102        1.02       98.70
         99 |        130        1.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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