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

    arrival |
   time ems |
      (min) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         80        0.80        0.80
          1 |         47        0.47        1.27
          2 |         52        0.52        1.79
          3 |         41        0.41        2.20
          4 |         44        0.44        2.64
          5 |         72        0.72        3.36
          6 |         54        0.54        3.90
          7 |         38        0.38        4.28
          8 |         47        0.47        4.75
          9 |         55        0.55        5.30
         10 |         64        0.64        5.94
         11 |         47        0.47        6.41
         12 |         43        0.43        6.84
         13 |         46        0.46        7.30
         14 |         45        0.45        7.75
         15 |         91        0.91        8.66
         16 |         36        0.36        9.02
         17 |         44        0.44        9.46
         18 |         57        0.57       10.03
         19 |         45        0.45       10.48
         20 |         94        0.94       11.42
         21 |         57        0.57       11.99
         22 |         40        0.40       12.39
         23 |         43        0.43       12.82
         24 |         53        0.53       13.35
         25 |         67        0.67       14.02
         26 |         47        0.47       14.49
         27 |         40        0.40       14.89
         28 |         42        0.42       15.31
         29 |         43        0.43       15.74
         30 |        100        1.00       16.74
         31 |         43        0.43       17.17
         32 |         48        0.48       17.65
         33 |         54        0.54       18.19
         34 |         50        0.50       18.69
         35 |         72        0.72       19.41
         36 |         43        0.43       19.84
         37 |         53        0.53       20.37
         38 |         39        0.39       20.76
         39 |         44        0.44       21.20
         40 |         69        0.69       21.89
         41 |         44        0.44       22.33
         42 |         35        0.35       22.68
         43 |         47        0.47       23.15
         44 |         45        0.45       23.60
         45 |         77        0.77       24.37
         46 |         38        0.38       24.75
         47 |         49        0.49       25.24
         48 |         36        0.36       25.60
         49 |         48        0.48       26.08
         50 |         90        0.90       26.98
         51 |         48        0.48       27.46
         52 |         45        0.45       27.91
         53 |         52        0.52       28.43
         54 |         44        0.44       28.87
         55 |         65        0.65       29.52
         56 |         43        0.43       29.95
         57 |         39        0.39       30.34
         58 |         40        0.40       30.74
         59 |         48        0.48       31.22
         88 |        131        1.31       32.53
         97 |          1        0.01       32.54
         98 |        268        2.68       35.22
         99 |      6,478       64.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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