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

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        630        6.30        6.30
          1 |        208        2.08        8.38
          2 |        197        1.97       10.35
          3 |        112        1.12       11.47
          4 |         93        0.93       12.40
          5 |         86        0.86       13.26
          6 |        122        1.22       14.48
          7 |        147        1.47       15.95
          8 |        124        1.24       17.19
          9 |        129        1.29       18.48
         10 |        109        1.09       19.57
         11 |        138        1.38       20.95
         12 |        138        1.38       22.33
         13 |        148        1.48       23.81
         14 |        179        1.79       25.60
         15 |        205        2.05       27.65
         16 |        210        2.10       29.75
         17 |        215        2.15       31.90
         18 |        202        2.02       33.92
         19 |        198        1.98       35.90
         20 |        222        2.22       38.12
         21 |        221        2.21       40.33
         22 |        237        2.37       42.70
         23 |        213        2.13       44.83
         99 |      5,517       55.17      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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