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

    arrival |
   time ems |
     (hour) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        117        1.17        1.17
          1 |        137        1.37        2.54
          2 |        117        1.17        3.71
          3 |         91        0.91        4.62
          4 |         73        0.73        5.35
          5 |         94        0.94        6.29
          6 |        117        1.17        7.46
          7 |        109        1.09        8.55
          8 |         91        0.91        9.46
          9 |        103        1.03       10.49
         10 |        102        1.02       11.51
         11 |        120        1.20       12.71
         12 |        143        1.43       14.14
         13 |        161        1.61       15.75
         14 |        149        1.49       17.24
         15 |        157        1.57       18.81
         16 |        196        1.96       20.77
         17 |        206        2.06       22.83
         18 |        223        2.23       25.06
         19 |        178        1.78       26.84
         20 |        164        1.64       28.48
         21 |        169        1.69       30.17
         22 |        143        1.43       31.60
         23 |        158        1.58       33.18
         88 |        408        4.08       37.26
         99 |      6,274       62.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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