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

    Arrival |
       Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        676        6.76        6.76
          1 |        231        2.31        9.07
          2 |        176        1.76       10.83
          3 |        126        1.26       12.09
          4 |        102        1.02       13.11
          5 |         90        0.90       14.01
          6 |        164        1.64       15.65
          7 |        145        1.45       17.10
          8 |        121        1.21       18.31
          9 |        127        1.27       19.58
         10 |        120        1.20       20.78
         11 |        133        1.33       22.11
         12 |        169        1.69       23.80
         13 |        157        1.57       25.37
         14 |        200        2.00       27.37
         15 |        241        2.41       29.78
         16 |        258        2.58       32.36
         17 |        214        2.14       34.50
         18 |        260        2.60       37.10
         19 |        217        2.17       39.27
         20 |        249        2.49       41.76
         21 |        251        2.51       44.27
         22 |        237        2.37       46.64
         23 |        244        2.44       49.08
         24 |          3        0.03       49.11
         99 |      5,089       50.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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