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

    Arrival |
       Time |
 EMS-Minute |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        697        6.97        6.97
          1 |         17        0.17        7.14
          2 |         21        0.21        7.35
          3 |         20        0.20        7.55
          4 |         28        0.28        7.83
          5 |         71        0.71        8.54
          6 |         26        0.26        8.80
          7 |         26        0.26        9.06
          8 |         29        0.29        9.35
          9 |         18        0.18        9.53
         10 |        104        1.04       10.57
         11 |         34        0.34       10.91
         12 |         27        0.27       11.18
         13 |         21        0.21       11.39
         14 |         23        0.23       11.62
         15 |        108        1.08       12.70
         16 |         21        0.21       12.91
         17 |         29        0.29       13.20
         18 |         34        0.34       13.54
         19 |         19        0.19       13.73
         20 |         97        0.97       14.70
         21 |         24        0.24       14.94
         22 |         31        0.31       15.25
         23 |         38        0.38       15.63
         24 |         23        0.23       15.86
         25 |         86        0.86       16.72
         26 |         26        0.26       16.98
         27 |         21        0.21       17.19
         28 |         24        0.24       17.43
         29 |         28        0.28       17.71
         30 |         95        0.95       18.66
         31 |         22        0.22       18.88
         32 |         31        0.31       19.19
         33 |         14        0.14       19.33
         34 |         16        0.16       19.49
         35 |         50        0.50       19.99
         36 |         20        0.20       20.19
         37 |         16        0.16       20.35
         38 |         21        0.21       20.56
         39 |         14        0.14       20.70
         40 |         97        0.97       21.67
         41 |         18        0.18       21.85
         42 |         25        0.25       22.10
         43 |         24        0.24       22.34
         44 |         17        0.17       22.51
         45 |         99        0.99       23.50
         46 |         29        0.29       23.79
         47 |         25        0.25       24.04
         48 |         18        0.18       24.22
         49 |         19        0.19       24.41
         50 |         80        0.80       25.21
         51 |         27        0.27       25.48
         52 |         31        0.31       25.79
         53 |         23        0.23       26.02
         54 |         18        0.18       26.20
         55 |         74        0.74       26.94
         56 |         27        0.27       27.21
         57 |         22        0.22       27.43
         58 |         33        0.33       27.76
         59 |         28        0.28       28.04
         99 |      7,196       71.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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