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

    Arrival |
       Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        951        9.51        9.51
          1 |        137        1.37       10.88
          2 |         95        0.95       11.83
          3 |         74        0.74       12.57
          4 |         57        0.57       13.14
          5 |         48        0.48       13.62
          6 |         71        0.71       14.33
          7 |         78        0.78       15.11
          8 |         80        0.80       15.91
          9 |         56        0.56       16.47
         10 |         72        0.72       17.19
         11 |         82        0.82       18.01
         12 |         72        0.72       18.73
         13 |         83        0.83       19.56
         14 |         97        0.97       20.53
         15 |        126        1.26       21.79
         16 |        152        1.52       23.31
         17 |        168        1.68       24.99
         18 |        158        1.58       26.57
         19 |        173        1.73       28.30
         20 |        144        1.44       29.74
         21 |        151        1.51       31.25
         22 |        138        1.38       32.63
         23 |        134        1.34       33.97
         24 |          5        0.05       34.02
         99 |      6,598       65.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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