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

    Arrival |
   Time EMS |
      (MIN) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         79        0.79        0.79
          1 |         63        0.63        1.42
          2 |         40        0.40        1.82
          3 |         59        0.59        2.41
          4 |         46        0.46        2.87
          5 |         75        0.75        3.62
          6 |         51        0.51        4.13
          7 |         56        0.56        4.69
          8 |         46        0.46        5.15
          9 |         48        0.48        5.63
         10 |         82        0.82        6.45
         11 |         52        0.52        6.97
         12 |         56        0.56        7.53
         13 |         59        0.59        8.12
         14 |         52        0.52        8.64
         15 |         87        0.87        9.51
         16 |         37        0.37        9.88
         17 |         46        0.46       10.34
         18 |         67        0.67       11.01
         19 |         42        0.42       11.43
         20 |         86        0.86       12.29
         21 |         47        0.47       12.76
         22 |         42        0.42       13.18
         23 |         38        0.38       13.56
         24 |         50        0.50       14.06
         25 |         73        0.73       14.79
         26 |         55        0.55       15.34
         27 |         46        0.46       15.80
         28 |         54        0.54       16.34
         29 |         45        0.45       16.79
         30 |         86        0.86       17.65
         31 |         42        0.42       18.07
         32 |         53        0.53       18.60
         33 |         49        0.49       19.09
         34 |         59        0.59       19.68
         35 |         62        0.62       20.30
         36 |         55        0.55       20.85
         37 |         42        0.42       21.27
         38 |         69        0.69       21.96
         39 |         49        0.49       22.45
         40 |         73        0.73       23.18
         41 |         41        0.41       23.59
         42 |         48        0.48       24.07
         43 |         53        0.53       24.60
         44 |         42        0.42       25.02
         45 |         84        0.84       25.86
         46 |         42        0.42       26.28
         47 |         42        0.42       26.70
         48 |         41        0.41       27.11
         49 |         43        0.43       27.54
         50 |         80        0.80       28.34
         51 |         43        0.43       28.77
         52 |         45        0.45       29.22
         53 |         42        0.42       29.64
         54 |         51        0.51       30.15
         55 |         65        0.65       30.80
         56 |         41        0.41       31.21
         57 |         63        0.63       31.84
         58 |         54        0.54       32.38
         59 |         36        0.36       32.74
         88 |        388        3.88       36.62
         97 |          1        0.01       36.63
         98 |          2        0.02       36.65
         99 |      6,335       63.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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