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

   arr_hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        306        3.06        3.06
          1 |        193        1.93        4.99
          2 |        221        2.21        7.20
          3 |        156        1.56        8.76
          4 |        122        1.22        9.98
          5 |        131        1.31       11.29
          6 |        199        1.99       13.28
          7 |        194        1.94       15.22
          8 |        137        1.37       16.59
          9 |        135        1.35       17.94
         10 |        168        1.68       19.62
         11 |        172        1.72       21.34
         12 |        185        1.85       23.19
         13 |        211        2.11       25.30
         14 |        239        2.39       27.69
         15 |        265        2.65       30.34
         16 |        239        2.39       32.73
         17 |        253        2.53       35.26
         18 |        262        2.62       37.88
         19 |        306        3.06       40.94
         20 |        265        2.65       43.59
         21 |        266        2.66       46.25
         22 |        227        2.27       48.52
         23 |        238        2.38       50.90
         24 |          3        0.03       50.93
         99 |      4,907       49.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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