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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        572        5.72        5.72
          1 |         74        0.74        6.46
          2 |         67        0.67        7.13
          3 |         76        0.76        7.89
          4 |         77        0.77        8.66
          5 |        105        1.05        9.71
          6 |         55        0.55       10.26
          7 |         64        0.64       10.90
          8 |         88        0.88       11.78
          9 |         68        0.68       12.46
         10 |        131        1.31       13.77
         11 |         69        0.69       14.46
         12 |         74        0.74       15.20
         13 |         77        0.77       15.97
         14 |         67        0.67       16.64
         15 |        140        1.40       18.04
         16 |         64        0.64       18.68
         17 |         81        0.81       19.49
         18 |         82        0.82       20.31
         19 |         61        0.61       20.92
         20 |        116        1.16       22.08
         21 |         66        0.66       22.74
         22 |         68        0.68       23.42
         23 |         84        0.84       24.26
         24 |         73        0.73       24.99
         25 |        114        1.14       26.13
         26 |         69        0.69       26.82
         27 |         71        0.71       27.53
         28 |         77        0.77       28.30
         29 |         71        0.71       29.01
         30 |        140        1.40       30.41
         31 |         64        0.64       31.05
         32 |         67        0.67       31.72
         33 |         69        0.69       32.41
         34 |         79        0.79       33.20
         35 |        117        1.17       34.37
         36 |         72        0.72       35.09
         37 |         60        0.60       35.69
         38 |         77        0.77       36.46
         39 |         73        0.73       37.19
         40 |        140        1.40       38.59
         41 |         38        0.38       38.97
         42 |         67        0.67       39.64
         43 |         81        0.81       40.45
         44 |         53        0.53       40.98
         45 |        124        1.24       42.22
         46 |         70        0.70       42.92
         47 |         50        0.50       43.42
         48 |         67        0.67       44.09
         49 |         65        0.65       44.74
         50 |        145        1.45       46.19
         51 |         55        0.55       46.74
         52 |         70        0.70       47.44
         53 |         69        0.69       48.13
         54 |         75        0.75       48.88
         55 |        128        1.28       50.16
         56 |         76        0.76       50.92
         57 |         75        0.75       51.67
         58 |         86        0.86       52.53
         59 |         84        0.84       53.37
         99 |      4,663       46.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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