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

    Arrival |
   Time EMS |
     (HOUR) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        116        1.16        1.16
          1 |        113        1.13        2.29
          2 |        118        1.18        3.47
          3 |         89        0.89        4.36
          4 |         71        0.71        5.07
          5 |         84        0.84        5.91
          6 |        129        1.29        7.20
          7 |        122        1.22        8.42
          8 |        114        1.14        9.56
          9 |        114        1.14       10.70
         10 |        130        1.30       12.00
         11 |        129        1.29       13.29
         12 |        142        1.42       14.71
         13 |        151        1.51       16.22
         14 |        162        1.62       17.84
         15 |        169        1.69       19.53
         16 |        182        1.82       21.35
         17 |        177        1.77       23.12
         18 |        170        1.70       24.82
         19 |        198        1.98       26.80
         20 |        176        1.76       28.56
         21 |        159        1.59       30.15
         22 |        141        1.41       31.56
         23 |        123        1.23       32.79
         88 |        388        3.88       36.67
         99 |      6,333       63.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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