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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        708        7.08        7.08
          1 |         22        0.22        7.30
          2 |         26        0.26        7.56
          3 |         28        0.28        7.84
          4 |         28        0.28        8.12
          5 |         81        0.81        8.93
          6 |         24        0.24        9.17
          7 |         40        0.40        9.57
          8 |         27        0.27        9.84
          9 |         17        0.17       10.01
         10 |         99        0.99       11.00
         11 |         16        0.16       11.16
         12 |         28        0.28       11.44
         13 |         29        0.29       11.73
         14 |         15        0.15       11.88
         15 |        107        1.07       12.95
         16 |         40        0.40       13.35
         17 |         33        0.33       13.68
         18 |         39        0.39       14.07
         19 |         14        0.14       14.21
         20 |         83        0.83       15.04
         21 |         29        0.29       15.33
         22 |         32        0.32       15.65
         23 |         28        0.28       15.93
         24 |         16        0.16       16.09
         25 |         77        0.77       16.86
         26 |         26        0.26       17.12
         27 |         30        0.30       17.42
         28 |         22        0.22       17.64
         29 |         13        0.13       17.77
         30 |        109        1.09       18.86
         31 |         20        0.20       19.06
         32 |         27        0.27       19.33
         33 |         31        0.31       19.64
         34 |         28        0.28       19.92
         35 |         75        0.75       20.67
         36 |         24        0.24       20.91
         37 |         27        0.27       21.18
         38 |         41        0.41       21.59
         39 |         18        0.18       21.77
         40 |         79        0.79       22.56
         41 |         32        0.32       22.88
         42 |         17        0.17       23.05
         43 |         28        0.28       23.33
         44 |         28        0.28       23.61
         45 |        102        1.02       24.63
         46 |         23        0.23       24.86
         47 |         33        0.33       25.19
         48 |         34        0.34       25.53
         49 |         31        0.31       25.84
         50 |         65        0.65       26.49
         51 |         19        0.19       26.68
         52 |         18        0.18       26.86
         53 |         27        0.27       27.13
         54 |         21        0.21       27.34
         55 |         54        0.54       27.88
         56 |         30        0.30       28.18
         57 |         30        0.30       28.48
         58 |         30        0.30       28.78
         59 |         24        0.24       29.02
         99 |      7,098       70.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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