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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,017       10.17       10.17
          1 |         22        0.22       10.39
          2 |         31        0.31       10.70
          3 |         24        0.24       10.94
          4 |         16        0.16       11.10
          5 |         86        0.86       11.96
          6 |         23        0.23       12.19
          7 |         21        0.21       12.40
          8 |         21        0.21       12.61
          9 |         23        0.23       12.84
         10 |         84        0.84       13.68
         11 |         13        0.13       13.81
         12 |         29        0.29       14.10
         13 |         24        0.24       14.34
         14 |         19        0.19       14.53
         15 |        101        1.01       15.54
         16 |         19        0.19       15.73
         17 |         24        0.24       15.97
         18 |         34        0.34       16.31
         19 |         14        0.14       16.45
         20 |         94        0.94       17.39
         21 |         13        0.13       17.52
         22 |         23        0.23       17.75
         23 |         26        0.26       18.01
         24 |         10        0.10       18.11
         25 |         74        0.74       18.85
         26 |         21        0.21       19.06
         27 |         18        0.18       19.24
         28 |         30        0.30       19.54
         29 |         26        0.26       19.80
         30 |        131        1.31       21.11
         31 |         22        0.22       21.33
         32 |         24        0.24       21.57
         33 |         30        0.30       21.87
         34 |         22        0.22       22.09
         35 |         83        0.83       22.92
         36 |         25        0.25       23.17
         37 |         28        0.28       23.45
         38 |         31        0.31       23.76
         39 |         20        0.20       23.96
         40 |         89        0.89       24.85
         41 |         19        0.19       25.04
         42 |         26        0.26       25.30
         43 |         22        0.22       25.52
         44 |         15        0.15       25.67
         45 |         99        0.99       26.66
         46 |         25        0.25       26.91
         47 |         19        0.19       27.10
         48 |         31        0.31       27.41
         49 |         19        0.19       27.60
         50 |         92        0.92       28.52
         51 |         24        0.24       28.76
         52 |         27        0.27       29.03
         53 |         23        0.23       29.26
         54 |         18        0.18       29.44
         55 |         75        0.75       30.19
         56 |         18        0.18       30.37
         57 |         25        0.25       30.62
         58 |         30        0.30       30.92
         59 |         17        0.17       31.09
         99 |      6,891       68.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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