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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        445        4.45        4.45
          1 |         57        0.57        5.02
          2 |         76        0.76        5.78
          3 |         71        0.71        6.49
          4 |         80        0.80        7.29
          5 |         99        0.99        8.28
          6 |         69        0.69        8.97
          7 |         53        0.53        9.50
          8 |         70        0.70       10.20
          9 |         76        0.76       10.96
         10 |        119        1.19       12.15
         11 |         61        0.61       12.76
         12 |         58        0.58       13.34
         13 |         77        0.77       14.11
         14 |         65        0.65       14.76
         15 |        119        1.19       15.95
         16 |         70        0.70       16.65
         17 |         74        0.74       17.39
         18 |         64        0.64       18.03
         19 |         60        0.60       18.63
         20 |        110        1.10       19.73
         21 |         62        0.62       20.35
         22 |         64        0.64       20.99
         23 |         67        0.67       21.66
         24 |         83        0.83       22.49
         25 |        127        1.27       23.76
         26 |         76        0.76       24.52
         27 |         67        0.67       25.19
         28 |         81        0.81       26.00
         29 |         68        0.68       26.68
         30 |        118        1.18       27.86
         31 |         77        0.77       28.63
         32 |         74        0.74       29.37
         33 |         72        0.72       30.09
         34 |         70        0.70       30.79
         35 |         90        0.90       31.69
         36 |         71        0.71       32.40
         37 |         73        0.73       33.13
         38 |         67        0.67       33.80
         39 |         69        0.69       34.49
         40 |        122        1.22       35.71
         41 |         65        0.65       36.36
         42 |         72        0.72       37.08
         43 |         60        0.60       37.68
         44 |         81        0.81       38.49
         45 |        126        1.26       39.75
         46 |         63        0.63       40.38
         47 |         73        0.73       41.11
         48 |         73        0.73       41.84
         49 |         80        0.80       42.64
         50 |        136        1.36       44.00
         51 |         57        0.57       44.57
         52 |         73        0.73       45.30
         53 |         73        0.73       46.03
         54 |         75        0.75       46.78
         55 |        115        1.15       47.93
         56 |         73        0.73       48.66
         57 |         60        0.60       49.26
         58 |         77        0.77       50.03
         59 |         73        0.73       50.76
         99 |      4,924       49.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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