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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        562        5.62        5.62
          1 |         70        0.70        6.32
          2 |         55        0.55        6.87
          3 |         73        0.73        7.60
          4 |         70        0.70        8.30
          5 |        114        1.14        9.44
          6 |         80        0.80       10.24
          7 |         81        0.81       11.05
          8 |         73        0.73       11.78
          9 |         70        0.70       12.48
         10 |        132        1.32       13.80
         11 |         45        0.45       14.25
         12 |         63        0.63       14.88
         13 |         77        0.77       15.65
         14 |         71        0.71       16.36
         15 |        131        1.31       17.67
         16 |         53        0.53       18.20
         17 |         71        0.71       18.91
         18 |         60        0.60       19.51
         19 |         62        0.62       20.13
         20 |        114        1.14       21.27
         21 |         53        0.53       21.80
         22 |         59        0.59       22.39
         23 |         48        0.48       22.87
         24 |         66        0.66       23.53
         25 |         85        0.85       24.38
         26 |         60        0.60       24.98
         27 |         52        0.52       25.50
         28 |         66        0.66       26.16
         29 |         76        0.76       26.92
         30 |        136        1.36       28.28
         31 |         60        0.60       28.88
         32 |         68        0.68       29.56
         33 |         69        0.69       30.25
         34 |         52        0.52       30.77
         35 |        125        1.25       32.02
         36 |         60        0.60       32.62
         37 |         75        0.75       33.37
         38 |         78        0.78       34.15
         39 |         53        0.53       34.68
         40 |        105        1.05       35.73
         41 |         57        0.57       36.30
         42 |         70        0.70       37.00
         43 |         59        0.59       37.59
         44 |         58        0.58       38.17
         45 |         97        0.97       39.14
         46 |         69        0.69       39.83
         47 |         55        0.55       40.38
         48 |         76        0.76       41.14
         49 |         65        0.65       41.79
         50 |        117        1.17       42.96
         51 |         52        0.52       43.48
         52 |         56        0.56       44.04
         53 |         78        0.78       44.82
         54 |         66        0.66       45.48
         55 |         99        0.99       46.47
         56 |         70        0.70       47.17
         57 |         58        0.58       47.75
         58 |         62        0.62       48.37
         59 |         71        0.71       49.08
         99 |      5,092       50.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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