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

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        803        8.03        8.03
          1 |        191        1.91        9.94
          2 |        157        1.57       11.51
          3 |         87        0.87       12.38
          4 |         71        0.71       13.09
          5 |         81        0.81       13.90
          6 |        110        1.10       15.00
          7 |        115        1.15       16.15
          8 |         98        0.98       17.13
          9 |         76        0.76       17.89
         10 |         93        0.93       18.82
         11 |        105        1.05       19.87
         12 |        124        1.24       21.11
         13 |        133        1.33       22.44
         14 |        158        1.58       24.02
         15 |        182        1.82       25.84
         16 |        180        1.80       27.64
         17 |        202        2.02       29.66
         18 |        184        1.84       31.50
         19 |        218        2.18       33.68
         20 |        186        1.86       35.54
         21 |        215        2.15       37.69
         22 |        184        1.84       39.53
         23 |        234        2.34       41.87
         24 |          2        0.02       41.89
         99 |      5,811       58.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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