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

    arrival |
   time ems |
     (hour) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        111        1.11        1.11
          1 |        103        1.03        2.14
          2 |        106        1.06        3.20
          3 |         75        0.75        3.95
          4 |         70        0.70        4.65
          5 |         84        0.84        5.49
          6 |        109        1.09        6.58
          7 |        120        1.20        7.78
          8 |        114        1.14        8.92
          9 |         94        0.94        9.86
         10 |        122        1.22       11.08
         11 |        135        1.35       12.43
         12 |        136        1.36       13.79
         13 |        136        1.36       15.15
         14 |        128        1.28       16.43
         15 |        155        1.55       17.98
         16 |        148        1.48       19.46
         17 |        181        1.81       21.27
         18 |        179        1.79       23.06
         19 |        205        2.05       25.11
         20 |        178        1.78       26.89
         21 |        156        1.56       28.45
         22 |        157        1.57       30.02
         23 |        122        1.22       31.24
         88 |        131        1.31       32.55
         99 |      6,745       67.45      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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