Frequencies for first 10,000 rows of lag_mins variable in person dataset :

   crash to |
      death |
    minutes |
  (minutes) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,782       17.82       17.82
          1 |         34        0.34       18.16
          2 |         29        0.29       18.45
          3 |         33        0.33       18.78
          4 |         23        0.23       19.01
          5 |         43        0.43       19.44
          6 |         29        0.29       19.73
          7 |         34        0.34       20.07
          8 |         34        0.34       20.41
          9 |         38        0.38       20.79
         10 |         49        0.49       21.28
         11 |         45        0.45       21.73
         12 |         34        0.34       22.07
         13 |         34        0.34       22.41
         14 |         41        0.41       22.82
         15 |         42        0.42       23.24
         16 |         34        0.34       23.58
         17 |         31        0.31       23.89
         18 |         30        0.30       24.19
         19 |         32        0.32       24.51
         20 |         51        0.51       25.02
         21 |         31        0.31       25.33
         22 |         33        0.33       25.66
         23 |         30        0.30       25.96
         24 |         36        0.36       26.32
         25 |         53        0.53       26.85
         26 |         36        0.36       27.21
         27 |         37        0.37       27.58
         28 |         41        0.41       27.99
         29 |         28        0.28       28.27
         30 |         51        0.51       28.78
         31 |         34        0.34       29.12
         32 |         39        0.39       29.51
         33 |         25        0.25       29.76
         34 |         35        0.35       30.11
         35 |         47        0.47       30.58
         36 |         45        0.45       31.03
         37 |         33        0.33       31.36
         38 |         27        0.27       31.63
         39 |         24        0.24       31.87
         40 |         56        0.56       32.43
         41 |         23        0.23       32.66
         42 |         42        0.42       33.08
         43 |         29        0.29       33.37
         44 |         27        0.27       33.64
         45 |         38        0.38       34.02
         46 |         22        0.22       34.24
         47 |         31        0.31       34.55
         48 |         30        0.30       34.85
         49 |         29        0.29       35.14
         50 |         45        0.45       35.59
         51 |         25        0.25       35.84
         52 |         36        0.36       36.20
         53 |         24        0.24       36.44
         54 |         25        0.25       36.69
         55 |         33        0.33       37.02
         56 |         21        0.21       37.23
         57 |         34        0.34       37.57
         58 |         22        0.22       37.79
         59 |         24        0.24       38.03
         99 |      6,197       61.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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