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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        770        7.70        7.70
          1 |         50        0.50        8.20
          2 |         71        0.71        8.91
          3 |         74        0.74        9.65
          4 |         60        0.60       10.25
          5 |        109        1.09       11.34
          6 |         69        0.69       12.03
          7 |         60        0.60       12.63
          8 |         82        0.82       13.45
          9 |         42        0.42       13.87
         10 |         99        0.99       14.86
         11 |         51        0.51       15.37
         12 |         66        0.66       16.03
         13 |         72        0.72       16.75
         14 |         66        0.66       17.41
         15 |        110        1.10       18.51
         16 |         67        0.67       19.18
         17 |         51        0.51       19.69
         18 |         65        0.65       20.34
         19 |         55        0.55       20.89
         20 |        124        1.24       22.13
         21 |         52        0.52       22.65
         22 |         66        0.66       23.31
         23 |         55        0.55       23.86
         24 |         49        0.49       24.35
         25 |         91        0.91       25.26
         26 |         66        0.66       25.92
         27 |         56        0.56       26.48
         28 |         56        0.56       27.04
         29 |         64        0.64       27.68
         30 |        121        1.21       28.89
         31 |         39        0.39       29.28
         32 |         52        0.52       29.80
         33 |         68        0.68       30.48
         34 |         56        0.56       31.04
         35 |        106        1.06       32.10
         36 |         60        0.60       32.70
         37 |         71        0.71       33.41
         38 |         74        0.74       34.15
         39 |         51        0.51       34.66
         40 |        111        1.11       35.77
         41 |         55        0.55       36.32
         42 |         57        0.57       36.89
         43 |         53        0.53       37.42
         44 |         44        0.44       37.86
         45 |        113        1.13       38.99
         46 |         58        0.58       39.57
         47 |         47        0.47       40.04
         48 |         54        0.54       40.58
         49 |         44        0.44       41.02
         50 |        134        1.34       42.36
         51 |         73        0.73       43.09
         52 |         49        0.49       43.58
         53 |         52        0.52       44.10
         54 |         57        0.57       44.67
         55 |         95        0.95       45.62
         56 |         46        0.46       46.08
         57 |         63        0.63       46.71
         58 |         76        0.76       47.47
         59 |         68        0.68       48.15
         99 |      5,185       51.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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