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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        628        6.28        6.28
          1 |         60        0.60        6.88
          2 |         62        0.62        7.50
          3 |         66        0.66        8.16
          4 |         85        0.85        9.01
          5 |        145        1.45       10.46
          6 |         57        0.57       11.03
          7 |         63        0.63       11.66
          8 |         62        0.62       12.28
          9 |         77        0.77       13.05
         10 |        135        1.35       14.40
         11 |         61        0.61       15.01
         12 |         68        0.68       15.69
         13 |         62        0.62       16.31
         14 |         57        0.57       16.88
         15 |        134        1.34       18.22
         16 |         79        0.79       19.01
         17 |         65        0.65       19.66
         18 |         79        0.79       20.45
         19 |         59        0.59       21.04
         20 |        143        1.43       22.47
         21 |         73        0.73       23.20
         22 |         78        0.78       23.98
         23 |         75        0.75       24.73
         24 |         56        0.56       25.29
         25 |        131        1.31       26.60
         26 |         73        0.73       27.33
         27 |         66        0.66       27.99
         28 |         83        0.83       28.82
         29 |         65        0.65       29.47
         30 |        133        1.33       30.80
         31 |         61        0.61       31.41
         32 |         70        0.70       32.11
         33 |         66        0.66       32.77
         34 |         81        0.81       33.58
         35 |        112        1.12       34.70
         36 |         67        0.67       35.37
         37 |         74        0.74       36.11
         38 |         73        0.73       36.84
         39 |         65        0.65       37.49
         40 |        131        1.31       38.80
         41 |         43        0.43       39.23
         42 |         58        0.58       39.81
         43 |         70        0.70       40.51
         44 |         66        0.66       41.17
         45 |        133        1.33       42.50
         46 |         61        0.61       43.11
         47 |         70        0.70       43.81
         48 |         67        0.67       44.48
         49 |         64        0.64       45.12
         50 |         97        0.97       46.09
         51 |         78        0.78       46.87
         52 |         86        0.86       47.73
         53 |         83        0.83       48.56
         54 |         66        0.66       49.22
         55 |         85        0.85       50.07
         56 |         65        0.65       50.72
         57 |         89        0.89       51.61
         58 |         58        0.58       52.19
         59 |         75        0.75       52.94
         99 |      4,706       47.06      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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