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

    arrival |
   time ems |
     (hour) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        105        1.05        1.05
          1 |        123        1.23        2.28
          2 |        104        1.04        3.32
          3 |         76        0.76        4.08
          4 |         78        0.78        4.86
          5 |         92        0.92        5.78
          6 |        130        1.30        7.08
          7 |        127        1.27        8.35
          8 |         91        0.91        9.26
          9 |         90        0.90       10.16
         10 |        116        1.16       11.32
         11 |        120        1.20       12.52
         12 |        122        1.22       13.74
         13 |        128        1.28       15.02
         14 |        147        1.47       16.49
         15 |        161        1.61       18.10
         16 |        156        1.56       19.66
         17 |        192        1.92       21.58
         18 |        190        1.90       23.48
         19 |        170        1.70       25.18
         20 |        208        2.08       27.26
         21 |        172        1.72       28.98
         22 |        145        1.45       30.43
         23 |        112        1.12       31.55
         88 |         85        0.85       32.40
         99 |      6,760       67.60      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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