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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        951        9.51        9.51
          1 |         21        0.21        9.72
          2 |         17        0.17        9.89
          3 |         33        0.33       10.22
          4 |         17        0.17       10.39
          5 |         90        0.90       11.29
          6 |         23        0.23       11.52
          7 |         29        0.29       11.81
          8 |         29        0.29       12.10
          9 |         28        0.28       12.38
         10 |        125        1.25       13.63
         11 |         17        0.17       13.80
         12 |         38        0.38       14.18
         13 |         25        0.25       14.43
         14 |         24        0.24       14.67
         15 |        124        1.24       15.91
         16 |         28        0.28       16.19
         17 |         22        0.22       16.41
         18 |         31        0.31       16.72
         19 |         28        0.28       17.00
         20 |        131        1.31       18.31
         21 |         20        0.20       18.51
         22 |         30        0.30       18.81
         23 |         22        0.22       19.03
         24 |         25        0.25       19.28
         25 |         99        0.99       20.27
         26 |         22        0.22       20.49
         27 |         22        0.22       20.71
         28 |         25        0.25       20.96
         29 |         18        0.18       21.14
         30 |        138        1.38       22.52
         31 |         20        0.20       22.72
         32 |         29        0.29       23.01
         33 |         29        0.29       23.30
         34 |         17        0.17       23.47
         35 |         98        0.98       24.45
         36 |         29        0.29       24.74
         37 |         29        0.29       25.03
         38 |         24        0.24       25.27
         39 |         25        0.25       25.52
         40 |        125        1.25       26.77
         41 |         28        0.28       27.05
         42 |         21        0.21       27.26
         43 |         26        0.26       27.52
         44 |         29        0.29       27.81
         45 |        107        1.07       28.88
         46 |         16        0.16       29.04
         47 |         29        0.29       29.33
         48 |         32        0.32       29.65
         49 |         18        0.18       29.83
         50 |        106        1.06       30.89
         51 |         16        0.16       31.05
         52 |         28        0.28       31.33
         53 |         28        0.28       31.61
         54 |         26        0.26       31.87
         55 |        108        1.08       32.95
         56 |         30        0.30       33.25
         57 |         26        0.26       33.51
         58 |         26        0.26       33.77
         59 |         25        0.25       34.02
         99 |      6,598       65.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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