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

    Arrival |
       Time |
   EMS-Hour |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        798        7.98        7.98
          1 |        216        2.16       10.14
          2 |        227        2.27       12.41
          3 |        126        1.26       13.67
          4 |         92        0.92       14.59
          5 |        109        1.09       15.68
          6 |        138        1.38       17.06
          7 |        162        1.62       18.68
          8 |        125        1.25       19.93
          9 |         98        0.98       20.91
         10 |        123        1.23       22.14
         11 |        129        1.29       23.43
         12 |        148        1.48       24.91
         13 |        156        1.56       26.47
         14 |        180        1.80       28.27
         15 |        224        2.24       30.51
         16 |        211        2.11       32.62
         17 |        220        2.20       34.82
         18 |        251        2.51       37.33
         19 |        272        2.72       40.05
         20 |        231        2.31       42.36
         21 |        261        2.61       44.97
         22 |        222        2.22       47.19
         23 |        252        2.52       49.71
         99 |      5,029       50.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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