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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        911        9.11        9.11
          1 |         16        0.16        9.27
          2 |         19        0.19        9.46
          3 |         25        0.25        9.71
          4 |         22        0.22        9.93
          5 |         84        0.84       10.77
          6 |         26        0.26       11.03
          7 |         27        0.27       11.30
          8 |         30        0.30       11.60
          9 |         20        0.20       11.80
         10 |        118        1.18       12.98
         11 |         17        0.17       13.15
         12 |         31        0.31       13.46
         13 |         13        0.13       13.59
         14 |         20        0.20       13.79
         15 |        115        1.15       14.94
         16 |         23        0.23       15.17
         17 |         31        0.31       15.48
         18 |         30        0.30       15.78
         19 |         25        0.25       16.03
         20 |        113        1.13       17.16
         21 |         30        0.30       17.46
         22 |         20        0.20       17.66
         23 |         24        0.24       17.90
         24 |         15        0.15       18.05
         25 |         90        0.90       18.95
         26 |         23        0.23       19.18
         27 |         29        0.29       19.47
         28 |         22        0.22       19.69
         29 |         19        0.19       19.88
         30 |        123        1.23       21.11
         31 |         23        0.23       21.34
         32 |         25        0.25       21.59
         33 |         30        0.30       21.89
         34 |         23        0.23       22.12
         35 |         87        0.87       22.99
         36 |         21        0.21       23.20
         37 |         28        0.28       23.48
         38 |         28        0.28       23.76
         39 |         14        0.14       23.90
         40 |        118        1.18       25.08
         41 |         15        0.15       25.23
         42 |         19        0.19       25.42
         43 |         25        0.25       25.67
         44 |         25        0.25       25.92
         45 |        117        1.17       27.09
         46 |         22        0.22       27.31
         47 |         22        0.22       27.53
         48 |         39        0.39       27.92
         49 |         20        0.20       28.12
         50 |         98        0.98       29.10
         51 |         15        0.15       29.25
         52 |         27        0.27       29.52
         53 |         19        0.19       29.71
         54 |         20        0.20       29.91
         55 |         81        0.81       30.72
         56 |         18        0.18       30.90
         57 |         26        0.26       31.16
         58 |         26        0.26       31.42
         59 |         20        0.20       31.62
         99 |      6,838       68.38      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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