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

     minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        854        8.54        8.54
          1 |         60        0.60        9.14
          2 |         73        0.73        9.87
          3 |         53        0.53       10.40
          4 |         61        0.61       11.01
          5 |        422        4.22       15.23
          6 |         55        0.55       15.78
          7 |         65        0.65       16.43
          8 |         85        0.85       17.28
          9 |         58        0.58       17.86
         10 |        511        5.11       22.97
         11 |         63        0.63       23.60
         12 |         78        0.78       24.38
         13 |         62        0.62       25.00
         14 |         61        0.61       25.61
         15 |        623        6.23       31.84
         16 |         54        0.54       32.38
         17 |         65        0.65       33.03
         18 |         86        0.86       33.89
         19 |         69        0.69       34.58
         20 |        561        5.61       40.19
         21 |         75        0.75       40.94
         22 |         67        0.67       41.61
         23 |         77        0.77       42.38
         24 |         60        0.60       42.98
         25 |        447        4.47       47.45
         26 |         52        0.52       47.97
         27 |         61        0.61       48.58
         28 |         81        0.81       49.39
         29 |         60        0.60       49.99
         30 |        832        8.32       58.31
         31 |         52        0.52       58.83
         32 |         78        0.78       59.61
         33 |         67        0.67       60.28
         34 |         76        0.76       61.04
         35 |        409        4.09       65.13
         36 |         61        0.61       65.74
         37 |         50        0.50       66.24
         38 |         78        0.78       67.02
         39 |         62        0.62       67.64
         40 |        540        5.40       73.04
         41 |         48        0.48       73.52
         42 |         61        0.61       74.13
         43 |         76        0.76       74.89
         44 |         65        0.65       75.54
         45 |        611        6.11       81.65
         46 |         62        0.62       82.27
         47 |         72        0.72       82.99
         48 |         85        0.85       83.84
         49 |         50        0.50       84.34
         50 |        552        5.52       89.86
         51 |         65        0.65       90.51
         52 |         63        0.63       91.14
         53 |         61        0.61       91.75
         54 |         57        0.57       92.32
         55 |        395        3.95       96.27
         56 |         53        0.53       96.80
         57 |         68        0.68       97.48
         58 |         79        0.79       98.27
         59 |         68        0.68       98.95
         99 |        105        1.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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