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

    Arrival |
       Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        738        7.38        7.38
          1 |        203        2.03        9.41
          2 |        195        1.95       11.36
          3 |        116        1.16       12.52
          4 |         97        0.97       13.49
          5 |         66        0.66       14.15
          6 |         84        0.84       14.99
          7 |        102        1.02       16.01
          8 |         87        0.87       16.88
          9 |         79        0.79       17.67
         10 |         92        0.92       18.59
         11 |         96        0.96       19.55
         12 |         96        0.96       20.51
         13 |        115        1.15       21.66
         14 |        132        1.32       22.98
         15 |        143        1.43       24.41
         16 |        165        1.65       26.06
         17 |        145        1.45       27.51
         18 |        207        2.07       29.58
         19 |        201        2.01       31.59
         20 |        194        1.94       33.53
         21 |        203        2.03       35.56
         22 |        205        2.05       37.61
         23 |        198        1.98       39.59
         24 |          9        0.09       39.68
         99 |      6,032       60.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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