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

Notificatio |
     n Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,014       10.14       10.14
          1 |         95        0.95       11.09
          2 |         85        0.85       11.94
          3 |         61        0.61       12.55
          4 |         19        0.19       12.74
          5 |         28        0.28       13.02
          6 |         29        0.29       13.31
          7 |         38        0.38       13.69
          8 |         30        0.30       13.99
          9 |         35        0.35       14.34
         10 |         37        0.37       14.71
         11 |         42        0.42       15.13
         12 |         28        0.28       15.41
         13 |         49        0.49       15.90
         14 |         47        0.47       16.37
         15 |         43        0.43       16.80
         16 |         75        0.75       17.55
         17 |         79        0.79       18.34
         18 |         83        0.83       19.17
         19 |         78        0.78       19.95
         20 |         75        0.75       20.70
         21 |         88        0.88       21.58
         22 |         79        0.79       22.37
         23 |         86        0.86       23.23
         24 |          2        0.02       23.25
         99 |      7,675       76.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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