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

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        672        6.72        6.72
          1 |        204        2.04        8.76
          2 |        203        2.03       10.79
          3 |        134        1.34       12.13
          4 |        119        1.19       13.32
          5 |         95        0.95       14.27
          6 |        121        1.21       15.48
          7 |        134        1.34       16.82
          8 |        125        1.25       18.07
          9 |        114        1.14       19.21
         10 |        111        1.11       20.32
         11 |        153        1.53       21.85
         12 |        160        1.60       23.45
         13 |        161        1.61       25.06
         14 |        192        1.92       26.98
         15 |        217        2.17       29.15
         16 |        217        2.17       31.32
         17 |        238        2.38       33.70
         18 |        259        2.59       36.29
         19 |        289        2.89       39.18
         20 |        286        2.86       42.04
         21 |        272        2.72       44.76
         22 |        241        2.41       47.17
         23 |        281        2.81       49.98
         24 |          2        0.02       50.00
         99 |      5,000       50.00      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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