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

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        647        6.47        6.47
          1 |        212        2.12        8.59
          2 |        151        1.51       10.10
          3 |        109        1.09       11.19
          4 |         81        0.81       12.00
          5 |         93        0.93       12.93
          6 |        138        1.38       14.31
          7 |        126        1.26       15.57
          8 |         98        0.98       16.55
          9 |        109        1.09       17.64
         10 |        110        1.10       18.74
         11 |        129        1.29       20.03
         12 |        151        1.51       21.54
         13 |        149        1.49       23.03
         14 |        186        1.86       24.89
         15 |        222        2.22       27.11
         16 |        221        2.21       29.32
         17 |        200        2.00       31.32
         18 |        238        2.38       33.70
         19 |        204        2.04       35.74
         20 |        222        2.22       37.96
         21 |        212        2.12       40.08
         22 |        226        2.26       42.34
         23 |        219        2.19       44.53
         24 |          1        0.01       44.54
         99 |      5,546       55.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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