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

    Arrival |
       Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        903        9.03        9.03
          1 |        117        1.17       10.20
          2 |        105        1.05       11.25
          3 |         60        0.60       11.85
          4 |         45        0.45       12.30
          5 |         37        0.37       12.67
          6 |         61        0.61       13.28
          7 |         64        0.64       13.92
          8 |         78        0.78       14.70
          9 |         52        0.52       15.22
         10 |         58        0.58       15.80
         11 |         62        0.62       16.42
         12 |         86        0.86       17.28
         13 |         72        0.72       18.00
         14 |        109        1.09       19.09
         15 |        117        1.17       20.26
         16 |        145        1.45       21.71
         17 |        167        1.67       23.38
         18 |        149        1.49       24.87
         19 |        148        1.48       26.35
         20 |        154        1.54       27.89
         21 |        115        1.15       29.04
         22 |        132        1.32       30.36
         23 |        119        1.19       31.55
         24 |          7        0.07       31.62
         99 |      6,838       68.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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