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

notificatio |
 n time ems |
     (hour) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        120        1.20        1.20
          1 |        111        1.11        2.31
          2 |        119        1.19        3.50
          3 |         85        0.85        4.35
          4 |         79        0.79        5.14
          5 |        105        1.05        6.19
          6 |        122        1.22        7.41
          7 |        108        1.08        8.49
          8 |        106        1.06        9.55
          9 |        101        1.01       10.56
         10 |        122        1.22       11.78
         11 |        143        1.43       13.21
         12 |        129        1.29       14.50
         13 |        130        1.30       15.80
         14 |        140        1.40       17.20
         15 |        176        1.76       18.96
         16 |        174        1.74       20.70
         17 |        184        1.84       22.54
         18 |        173        1.73       24.27
         19 |        198        1.98       26.25
         20 |        178        1.78       28.03
         21 |        153        1.53       29.56
         22 |        140        1.40       30.96
         23 |        107        1.07       32.03
         88 |        131        1.31       33.34
         99 |      6,666       66.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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