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

     minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        734        7.34        7.34
          1 |         88        0.88        8.22
          2 |         69        0.69        8.91
          3 |         86        0.86        9.77
          4 |         70        0.70       10.47
          5 |        384        3.84       14.31
          6 |         70        0.70       15.01
          7 |         72        0.72       15.73
          8 |         88        0.88       16.61
          9 |         75        0.75       17.36
         10 |        443        4.43       21.79
         11 |         51        0.51       22.30
         12 |        102        1.02       23.32
         13 |         94        0.94       24.26
         14 |         81        0.81       25.07
         15 |        554        5.54       30.61
         16 |         85        0.85       31.46
         17 |         80        0.80       32.26
         18 |         99        0.99       33.25
         19 |         74        0.74       33.99
         20 |        512        5.12       39.11
         21 |         60        0.60       39.71
         22 |         87        0.87       40.58
         23 |        105        1.05       41.63
         24 |         90        0.90       42.53
         25 |        379        3.79       46.32
         26 |         72        0.72       47.04
         27 |         83        0.83       47.87
         28 |         89        0.89       48.76
         29 |         74        0.74       49.50
         30 |        669        6.69       56.19
         31 |         62        0.62       56.81
         32 |        108        1.08       57.89
         33 |         87        0.87       58.76
         34 |         87        0.87       59.63
         35 |        390        3.90       63.53
         36 |         80        0.80       64.33
         37 |         81        0.81       65.14
         38 |         83        0.83       65.97
         39 |         63        0.63       66.60
         40 |        477        4.77       71.37
         41 |         64        0.64       72.01
         42 |        102        1.02       73.03
         43 |         85        0.85       73.88
         44 |         78        0.78       74.66
         45 |        530        5.30       79.96
         46 |         73        0.73       80.69
         47 |         80        0.80       81.49
         48 |         91        0.91       82.40
         49 |         93        0.93       83.33
         50 |        515        5.15       88.48
         51 |         68        0.68       89.16
         52 |         87        0.87       90.03
         53 |         80        0.80       90.83
         54 |         74        0.74       91.57
         55 |        390        3.90       95.47
         56 |         71        0.71       96.18
         57 |         86        0.86       97.04
         58 |        107        1.07       98.11
         59 |         80        0.80       98.91
         99 |        109        1.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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