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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        640        6.40        6.40
          1 |         48        0.48        6.88
          2 |         67        0.67        7.55
          3 |         85        0.85        8.40
          4 |         58        0.58        8.98
          5 |        119        1.19       10.17
          6 |         64        0.64       10.81
          7 |         58        0.58       11.39
          8 |         73        0.73       12.12
          9 |         39        0.39       12.51
         10 |        142        1.42       13.93
         11 |         69        0.69       14.62
         12 |         77        0.77       15.39
         13 |         56        0.56       15.95
         14 |         60        0.60       16.55
         15 |        198        1.98       18.53
         16 |         60        0.60       19.13
         17 |         72        0.72       19.85
         18 |         68        0.68       20.53
         19 |         64        0.64       21.17
         20 |        138        1.38       22.55
         21 |         73        0.73       23.28
         22 |         72        0.72       24.00
         23 |         70        0.70       24.70
         24 |         70        0.70       25.40
         25 |        120        1.20       26.60
         26 |         56        0.56       27.16
         27 |         54        0.54       27.70
         28 |         76        0.76       28.46
         29 |         67        0.67       29.13
         30 |        165        1.65       30.78
         31 |         65        0.65       31.43
         32 |         56        0.56       31.99
         33 |         66        0.66       32.65
         34 |         63        0.63       33.28
         35 |        125        1.25       34.53
         36 |         60        0.60       35.13
         37 |         56        0.56       35.69
         38 |         60        0.60       36.29
         39 |         64        0.64       36.93
         40 |        135        1.35       38.28
         41 |         66        0.66       38.94
         42 |         62        0.62       39.56
         43 |         67        0.67       40.23
         44 |         82        0.82       41.05
         45 |        118        1.18       42.23
         46 |         66        0.66       42.89
         47 |         75        0.75       43.64
         48 |         69        0.69       44.33
         49 |         64        0.64       44.97
         50 |        153        1.53       46.50
         51 |         65        0.65       47.15
         52 |         59        0.59       47.74
         53 |         60        0.60       48.34
         54 |         58        0.58       48.92
         55 |        111        1.11       50.03
         56 |         67        0.67       50.70
         57 |         69        0.69       51.39
         58 |         76        0.76       52.15
         59 |         62        0.62       52.77
         99 |      4,723       47.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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