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

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        913        9.13        9.13
          1 |        106        1.06       10.19
          2 |         71        0.71       10.90
          3 |         50        0.50       11.40
          4 |         24        0.24       11.64
          5 |         25        0.25       11.89
          6 |         47        0.47       12.36
          7 |         50        0.50       12.86
          8 |         48        0.48       13.34
          9 |         41        0.41       13.75
         10 |         39        0.39       14.14
         11 |         49        0.49       14.63
         12 |         43        0.43       15.06
         13 |         49        0.49       15.55
         14 |         68        0.68       16.23
         15 |         85        0.85       17.08
         16 |         90        0.90       17.98
         17 |         94        0.94       18.92
         18 |        109        1.09       20.01
         19 |        119        1.19       21.20
         20 |        110        1.10       22.30
         21 |         98        0.98       23.28
         22 |         97        0.97       24.25
         23 |         93        0.93       25.18
         24 |          1        0.01       25.19
         99 |      7,481       74.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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