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

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        537        5.37        5.37
          1 |        237        2.37        7.74
          2 |        218        2.18        9.92
          3 |        104        1.04       10.96
          4 |        100        1.00       11.96
          5 |        113        1.13       13.09
          6 |        153        1.53       14.62
          7 |        111        1.11       15.73
          8 |        112        1.12       16.85
          9 |        105        1.05       17.90
         10 |        116        1.16       19.06
         11 |        130        1.30       20.36
         12 |        149        1.49       21.85
         13 |        136        1.36       23.21
         14 |        187        1.87       25.08
         15 |        211        2.11       27.19
         16 |        209        2.09       29.28
         17 |        226        2.26       31.54
         18 |        237        2.37       33.91
         19 |        238        2.38       36.29
         20 |        226        2.26       38.55
         21 |        254        2.54       41.09
         22 |        222        2.22       43.31
         23 |        221        2.21       45.52
         24 |          4        0.04       45.56
         99 |      5,444       54.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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