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

    Arrival |
       Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        745        7.45        7.45
          1 |        252        2.52        9.97
          2 |        260        2.60       12.57
          3 |        133        1.33       13.90
          4 |        118        1.18       15.08
          5 |        107        1.07       16.15
          6 |        141        1.41       17.56
          7 |        153        1.53       19.09
          8 |        109        1.09       20.18
          9 |        132        1.32       21.50
         10 |        151        1.51       23.01
         11 |        151        1.51       24.52
         12 |        145        1.45       25.97
         13 |        140        1.40       27.37
         14 |        202        2.02       29.39
         15 |        199        1.99       31.38
         16 |        225        2.25       33.63
         17 |        267        2.67       36.30
         18 |        279        2.79       39.09
         19 |        285        2.85       41.94
         20 |        301        3.01       44.95
         21 |        257        2.57       47.52
         22 |        276        2.76       50.28
         23 |        264        2.64       52.92
         24 |          3        0.03       52.95
         99 |      4,705       47.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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