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

     minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        637        6.37        6.37
          1 |         82        0.82        7.19
          2 |         98        0.98        8.17
          3 |        107        1.07        9.24
          4 |         81        0.81       10.05
          5 |        335        3.35       13.40
          6 |         88        0.88       14.28
          7 |         88        0.88       15.16
          8 |        130        1.30       16.46
          9 |         83        0.83       17.29
         10 |        405        4.05       21.34
         11 |         89        0.89       22.23
         12 |        114        1.14       23.37
         13 |        106        1.06       24.43
         14 |         95        0.95       25.38
         15 |        429        4.29       29.67
         16 |         82        0.82       30.49
         17 |         91        0.91       31.40
         18 |        122        1.22       32.62
         19 |        101        1.01       33.63
         20 |        443        4.43       38.06
         21 |         96        0.96       39.02
         22 |         97        0.97       39.99
         23 |         99        0.99       40.98
         24 |         98        0.98       41.96
         25 |        391        3.91       45.87
         26 |        101        1.01       46.88
         27 |         93        0.93       47.81
         28 |        105        1.05       48.86
         29 |         83        0.83       49.69
         30 |        575        5.75       55.44
         31 |         82        0.82       56.26
         32 |        104        1.04       57.30
         33 |        102        1.02       58.32
         34 |         93        0.93       59.25
         35 |        330        3.30       62.55
         36 |         87        0.87       63.42
         37 |         81        0.81       64.23
         38 |        117        1.17       65.40
         39 |         73        0.73       66.13
         40 |        424        4.24       70.37
         41 |         76        0.76       71.13
         42 |        128        1.28       72.41
         43 |         95        0.95       73.36
         44 |         88        0.88       74.24
         45 |        467        4.67       78.91
         46 |         79        0.79       79.70
         47 |        104        1.04       80.74
         48 |        102        1.02       81.76
         49 |         97        0.97       82.73
         50 |        444        4.44       87.17
         51 |         70        0.70       87.87
         52 |        100        1.00       88.87
         53 |        112        1.12       89.99
         54 |         79        0.79       90.78
         55 |        354        3.54       94.32
         56 |         87        0.87       95.19
         57 |         97        0.97       96.16
         58 |        130        1.30       97.46
         59 |         76        0.76       98.22
         99 |        178        1.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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