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

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        767        7.67        7.67
          1 |        194        1.94        9.61
          2 |        193        1.93       11.54
          3 |        101        1.01       12.55
          4 |         84        0.84       13.39
          5 |        107        1.07       14.46
          6 |        123        1.23       15.69
          7 |        141        1.41       17.10
          8 |        111        1.11       18.21
          9 |         82        0.82       19.03
         10 |        112        1.12       20.15
         11 |        127        1.27       21.42
         12 |        130        1.30       22.72
         13 |        144        1.44       24.16
         14 |        170        1.70       25.86
         15 |        189        1.89       27.75
         16 |        198        1.98       29.73
         17 |        191        1.91       31.64
         18 |        248        2.48       34.12
         19 |        234        2.34       36.46
         20 |        218        2.18       38.64
         21 |        235        2.35       40.99
         22 |        217        2.17       43.16
         23 |        209        2.09       45.25
         24 |          1        0.01       45.26
         99 |      5,474       54.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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