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

    arrival |
   time ems |
     (hour) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        111        1.11        1.11
          1 |        113        1.13        2.24
          2 |        107        1.07        3.31
          3 |         85        0.85        4.16
          4 |         78        0.78        4.94
          5 |         73        0.73        5.67
          6 |        112        1.12        6.79
          7 |        124        1.24        8.03
          8 |        108        1.08        9.11
          9 |        110        1.10       10.21
         10 |        116        1.16       11.37
         11 |        121        1.21       12.58
         12 |        150        1.50       14.08
         13 |        130        1.30       15.38
         14 |        175        1.75       17.13
         15 |        199        1.99       19.12
         16 |        179        1.79       20.91
         17 |        173        1.73       22.64
         18 |        197        1.97       24.61
         19 |        173        1.73       26.34
         20 |        179        1.79       28.13
         21 |        168        1.68       29.81
         22 |        146        1.46       31.27
         23 |        148        1.48       32.75
         88 |        185        1.85       34.60
         99 |      6,540       65.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016