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

    Arrival |
       Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        789        7.89        7.89
          1 |        245        2.45       10.34
          2 |        245        2.45       12.79
          3 |        152        1.52       14.31
          4 |        116        1.16       15.47
          5 |        115        1.15       16.62
          6 |        142        1.42       18.04
          7 |        141        1.41       19.45
          8 |        122        1.22       20.67
          9 |         91        0.91       21.58
         10 |        132        1.32       22.90
         11 |        133        1.33       24.23
         12 |        146        1.46       25.69
         13 |        165        1.65       27.34
         14 |        184        1.84       29.18
         15 |        194        1.94       31.12
         16 |        228        2.28       33.40
         17 |        236        2.36       35.76
         18 |        293        2.93       38.69
         19 |        307        3.07       41.76
         20 |        290        2.90       44.66
         21 |        282        2.82       47.48
         22 |        266        2.66       50.14
         23 |        274        2.74       52.88
         24 |          6        0.06       52.94
         99 |      4,706       47.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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