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

   arr_hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        282        2.82        2.82
          1 |        203        2.03        4.85
          2 |        219        2.19        7.04
          3 |        152        1.52        8.56
          4 |        159        1.59       10.15
          5 |        158        1.58       11.73
          6 |        192        1.92       13.65
          7 |        197        1.97       15.62
          8 |        151        1.51       17.13
          9 |        152        1.52       18.65
         10 |        168        1.68       20.33
         11 |        188        1.88       22.21
         12 |        203        2.03       24.24
         13 |        197        1.97       26.21
         14 |        263        2.63       28.84
         15 |        274        2.74       31.58
         16 |        270        2.70       34.28
         17 |        280        2.80       37.08
         18 |        317        3.17       40.25
         19 |        294        2.94       43.19
         20 |        291        2.91       46.10
         21 |        286        2.86       48.96
         22 |        253        2.53       51.49
         23 |        250        2.50       53.99
         24 |          3        0.03       54.02
         99 |      4,598       45.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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