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

    Arrival |
       Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        817        8.17        8.17
          1 |        169        1.69        9.86
          2 |        132        1.32       11.18
          3 |         77        0.77       11.95
          4 |         45        0.45       12.40
          5 |         40        0.40       12.80
          6 |         71        0.71       13.51
          7 |        102        1.02       14.53
          8 |         80        0.80       15.33
          9 |         66        0.66       15.99
         10 |         66        0.66       16.65
         11 |         81        0.81       17.46
         12 |         83        0.83       18.29
         13 |        109        1.09       19.38
         14 |        108        1.08       20.46
         15 |        164        1.64       22.10
         16 |        170        1.70       23.80
         17 |        174        1.74       25.54
         18 |        178        1.78       27.32
         19 |        173        1.73       29.05
         20 |        154        1.54       30.59
         21 |        140        1.40       31.99
         22 |        144        1.44       33.43
         23 |        157        1.57       35.00
         24 |          5        0.05       35.05
         99 |      6,495       64.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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