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

    Arrival |
       Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        726        7.26        7.26
          1 |        133        1.33        8.59
          2 |        110        1.10        9.69
          3 |         85        0.85       10.54
          4 |         44        0.44       10.98
          5 |         50        0.50       11.48
          6 |         54        0.54       12.02
          7 |         57        0.57       12.59
          8 |         58        0.58       13.17
          9 |         36        0.36       13.53
         10 |         57        0.57       14.10
         11 |         52        0.52       14.62
         12 |         69        0.69       15.31
         13 |         67        0.67       15.98
         14 |         82        0.82       16.80
         15 |         98        0.98       17.78
         16 |        118        1.18       18.96
         17 |        131        1.31       20.27
         18 |        143        1.43       21.70
         19 |        113        1.13       22.83
         20 |        133        1.33       24.16
         21 |        115        1.15       25.31
         22 |        144        1.44       26.75
         23 |        126        1.26       28.01
         24 |          3        0.03       28.04
         99 |      7,196       71.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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