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

     minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        708        7.08        7.08
          1 |        104        1.04        8.12
          2 |        102        1.02        9.14
          3 |         91        0.91       10.05
          4 |         63        0.63       10.68
          5 |        410        4.10       14.78
          6 |         74        0.74       15.52
          7 |         82        0.82       16.34
          8 |        103        1.03       17.37
          9 |         83        0.83       18.20
         10 |        435        4.35       22.55
         11 |         66        0.66       23.21
         12 |        126        1.26       24.47
         13 |         82        0.82       25.29
         14 |         86        0.86       26.15
         15 |        483        4.83       30.98
         16 |         81        0.81       31.79
         17 |         88        0.88       32.67
         18 |         95        0.95       33.62
         19 |         94        0.94       34.56
         20 |        481        4.81       39.37
         21 |         73        0.73       40.10
         22 |         81        0.81       40.91
         23 |         87        0.87       41.78
         24 |         80        0.80       42.58
         25 |        371        3.71       46.29
         26 |         69        0.69       46.98
         27 |         71        0.71       47.69
         28 |         99        0.99       48.68
         29 |         80        0.80       49.48
         30 |        671        6.71       56.19
         31 |         59        0.59       56.78
         32 |         92        0.92       57.70
         33 |         83        0.83       58.53
         34 |         80        0.80       59.33
         35 |        365        3.65       62.98
         36 |         64        0.64       63.62
         37 |         72        0.72       64.34
         38 |        101        1.01       65.35
         39 |         80        0.80       66.15
         40 |        505        5.05       71.20
         41 |         62        0.62       71.82
         42 |         99        0.99       72.81
         43 |         87        0.87       73.68
         44 |         73        0.73       74.41
         45 |        494        4.94       79.35
         46 |         72        0.72       80.07
         47 |        103        1.03       81.10
         48 |        119        1.19       82.29
         49 |         74        0.74       83.03
         50 |        487        4.87       87.90
         51 |         65        0.65       88.55
         52 |         91        0.91       89.46
         53 |         96        0.96       90.42
         54 |         84        0.84       91.26
         55 |        384        3.84       95.10
         56 |         84        0.84       95.94
         57 |         87        0.87       96.81
         58 |        113        1.13       97.94
         59 |         79        0.79       98.73
         99 |        127        1.27      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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