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

   crash to |
      death |
    minutes |
  (minutes) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,636       16.36       16.36
          1 |         37        0.37       16.73
          2 |         42        0.42       17.15
          3 |         53        0.53       17.68
          4 |         37        0.37       18.05
          5 |         66        0.66       18.71
          6 |         30        0.30       19.01
          7 |         36        0.36       19.37
          8 |         30        0.30       19.67
          9 |         46        0.46       20.13
         10 |         73        0.73       20.86
         11 |         39        0.39       21.25
         12 |         53        0.53       21.78
         13 |         36        0.36       22.14
         14 |         43        0.43       22.57
         15 |         61        0.61       23.18
         16 |         46        0.46       23.64
         17 |         25        0.25       23.89
         18 |         37        0.37       24.26
         19 |         24        0.24       24.50
         20 |         68        0.68       25.18
         21 |         43        0.43       25.61
         22 |         31        0.31       25.92
         23 |         49        0.49       26.41
         24 |         36        0.36       26.77
         25 |         60        0.60       27.37
         26 |         34        0.34       27.71
         27 |         46        0.46       28.17
         28 |         30        0.30       28.47
         29 |         40        0.40       28.87
         30 |         64        0.64       29.51
         31 |         43        0.43       29.94
         32 |         37        0.37       30.31
         33 |         30        0.30       30.61
         34 |         30        0.30       30.91
         35 |         63        0.63       31.54
         36 |         35        0.35       31.89
         37 |         40        0.40       32.29
         38 |         42        0.42       32.71
         39 |         45        0.45       33.16
         40 |         47        0.47       33.63
         41 |         23        0.23       33.86
         42 |         38        0.38       34.24
         43 |         37        0.37       34.61
         44 |         31        0.31       34.92
         45 |         57        0.57       35.49
         46 |         32        0.32       35.81
         47 |         26        0.26       36.07
         48 |         24        0.24       36.31
         49 |         40        0.40       36.71
         50 |         45        0.45       37.16
         51 |         29        0.29       37.45
         52 |         34        0.34       37.79
         53 |         35        0.35       38.14
         54 |         37        0.37       38.51
         55 |         51        0.51       39.02
         56 |         27        0.27       39.29
         57 |         24        0.24       39.53
         58 |         27        0.27       39.80
         59 |         32        0.32       40.12
         99 |      5,988       59.88      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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