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

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        728        7.28        7.28
          1 |        233        2.33        9.61
          2 |        219        2.19       11.80
          3 |        121        1.21       13.01
          4 |         97        0.97       13.98
          5 |         95        0.95       14.93
          6 |        138        1.38       16.31
          7 |        132        1.32       17.63
          8 |         98        0.98       18.61
          9 |        124        1.24       19.85
         10 |        143        1.43       21.28
         11 |        121        1.21       22.49
         12 |        137        1.37       23.86
         13 |        125        1.25       25.11
         14 |        182        1.82       26.93
         15 |        178        1.78       28.71
         16 |        209        2.09       30.80
         17 |        231        2.31       33.11
         18 |        248        2.48       35.59
         19 |        252        2.52       38.11
         20 |        266        2.66       40.77
         21 |        239        2.39       43.16
         22 |        248        2.48       45.64
         23 |        244        2.44       48.08
         24 |          4        0.04       48.12
         99 |      5,188       51.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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