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

notificatio |
 n time ems |
     (hour) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        117        1.17        1.17
          1 |        111        1.11        2.28
          2 |        119        1.19        3.47
          3 |         85        0.85        4.32
          4 |         81        0.81        5.13
          5 |        104        1.04        6.17
          6 |        120        1.20        7.37
          7 |        109        1.09        8.46
          8 |        105        1.05        9.51
          9 |        101        1.01       10.52
         10 |        122        1.22       11.74
         11 |        143        1.43       13.17
         12 |        134        1.34       14.51
         13 |        130        1.30       15.81
         14 |        137        1.37       17.18
         15 |        179        1.79       18.97
         16 |        175        1.75       20.72
         17 |        186        1.86       22.58
         18 |        172        1.72       24.30
         19 |        196        1.96       26.26
         20 |        175        1.75       28.01
         21 |        154        1.54       29.55
         22 |        141        1.41       30.96
         23 |        110        1.10       32.06
         88 |        132        1.32       33.38
         99 |      6,662       66.62      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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