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

    arrival |
   time ems |
      (min) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        104        1.04        1.04
          1 |         43        0.43        1.47
          2 |         44        0.44        1.91
          3 |         47        0.47        2.38
          4 |         33        0.33        2.71
          5 |         72        0.72        3.43
          6 |         34        0.34        3.77
          7 |         54        0.54        4.31
          8 |         46        0.46        4.77
          9 |         53        0.53        5.30
         10 |         88        0.88        6.18
         11 |         40        0.40        6.58
         12 |         48        0.48        7.06
         13 |         51        0.51        7.57
         14 |         49        0.49        8.06
         15 |         87        0.87        8.93
         16 |         41        0.41        9.34
         17 |         52        0.52        9.86
         18 |         47        0.47       10.33
         19 |         47        0.47       10.80
         20 |         75        0.75       11.55
         21 |         47        0.47       12.02
         22 |         66        0.66       12.68
         23 |         52        0.52       13.20
         24 |         58        0.58       13.78
         25 |         80        0.80       14.58
         26 |         48        0.48       15.06
         27 |         52        0.52       15.58
         28 |         39        0.39       15.97
         29 |         54        0.54       16.51
         30 |         81        0.81       17.32
         31 |         43        0.43       17.75
         32 |         63        0.63       18.38
         33 |         39        0.39       18.77
         34 |         35        0.35       19.12
         35 |         76        0.76       19.88
         36 |         50        0.50       20.38
         37 |         56        0.56       20.94
         38 |         42        0.42       21.36
         39 |         41        0.41       21.77
         40 |         76        0.76       22.53
         41 |         45        0.45       22.98
         42 |         47        0.47       23.45
         43 |         40        0.40       23.85
         44 |         52        0.52       24.37
         45 |         95        0.95       25.32
         46 |         56        0.56       25.88
         47 |         40        0.40       26.28
         48 |         51        0.51       26.79
         49 |         53        0.53       27.32
         50 |         82        0.82       28.14
         51 |         29        0.29       28.43
         52 |         51        0.51       28.94
         53 |         47        0.47       29.41
         54 |         35        0.35       29.76
         55 |         85        0.85       30.61
         56 |         59        0.59       31.20
         57 |         51        0.51       31.71
         58 |         55        0.55       32.26
         59 |         49        0.49       32.75
         88 |        185        1.85       34.60
         97 |          9        0.09       34.69
         98 |        150        1.50       36.19
         99 |      6,381       63.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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