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

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        883        8.83        8.83
          1 |         90        0.90        9.73
          2 |         87        0.87       10.60
          3 |         33        0.33       10.93
          4 |         25        0.25       11.18
          5 |         25        0.25       11.43
          6 |         38        0.38       11.81
          7 |         51        0.51       12.32
          8 |         44        0.44       12.76
          9 |         32        0.32       13.08
         10 |         33        0.33       13.41
         11 |         45        0.45       13.86
         12 |         45        0.45       14.31
         13 |         48        0.48       14.79
         14 |         70        0.70       15.49
         15 |         75        0.75       16.24
         16 |         96        0.96       17.20
         17 |        100        1.00       18.20
         18 |         96        0.96       19.16
         19 |        116        1.16       20.32
         20 |         90        0.90       21.22
         21 |         79        0.79       22.01
         22 |         93        0.93       22.94
         23 |         87        0.87       23.81
         24 |          1        0.01       23.82
         99 |      7,618       76.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016