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

    Arrival |
       Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        584        5.84        5.84
          1 |        264        2.64        8.48
          2 |        238        2.38       10.86
          3 |        132        1.32       12.18
          4 |        113        1.13       13.31
          5 |        135        1.35       14.66
          6 |        164        1.64       16.30
          7 |        133        1.33       17.63
          8 |        123        1.23       18.86
          9 |        124        1.24       20.10
         10 |        129        1.29       21.39
         11 |        140        1.40       22.79
         12 |        170        1.70       24.49
         13 |        149        1.49       25.98
         14 |        203        2.03       28.01
         15 |        230        2.30       30.31
         16 |        239        2.39       32.70
         17 |        249        2.49       35.19
         18 |        265        2.65       37.84
         19 |        277        2.77       40.61
         20 |        239        2.39       43.00
         21 |        283        2.83       45.83
         22 |        233        2.33       48.16
         23 |        256        2.56       50.72
         24 |          5        0.05       50.77
         99 |      4,923       49.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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