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

   crash to |
      death |
    minutes |
  (minutes) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      2,176       21.76       21.76
          1 |         28        0.28       22.04
          2 |         41        0.41       22.45
          3 |         23        0.23       22.68
          4 |         43        0.43       23.11
          5 |         58        0.58       23.69
          6 |         25        0.25       23.94
          7 |         34        0.34       24.28
          8 |         38        0.38       24.66
          9 |         36        0.36       25.02
         10 |         39        0.39       25.41
         11 |         31        0.31       25.72
         12 |         29        0.29       26.01
         13 |         36        0.36       26.37
         14 |         27        0.27       26.64
         15 |         33        0.33       26.97
         16 |         31        0.31       27.28
         17 |         37        0.37       27.65
         18 |         32        0.32       27.97
         19 |         24        0.24       28.21
         20 |         39        0.39       28.60
         21 |         28        0.28       28.88
         22 |         26        0.26       29.14
         23 |         27        0.27       29.41
         24 |         32        0.32       29.73
         25 |         33        0.33       30.06
         26 |         30        0.30       30.36
         27 |         35        0.35       30.71
         28 |         23        0.23       30.94
         29 |         40        0.40       31.34
         30 |         39        0.39       31.73
         31 |         37        0.37       32.10
         32 |         29        0.29       32.39
         33 |         26        0.26       32.65
         34 |         33        0.33       32.98
         35 |         34        0.34       33.32
         36 |         23        0.23       33.55
         37 |         28        0.28       33.83
         38 |         22        0.22       34.05
         39 |         26        0.26       34.31
         40 |         32        0.32       34.63
         41 |         40        0.40       35.03
         42 |         33        0.33       35.36
         43 |         40        0.40       35.76
         44 |         22        0.22       35.98
         45 |         32        0.32       36.30
         46 |         24        0.24       36.54
         47 |         27        0.27       36.81
         48 |         18        0.18       36.99
         49 |         18        0.18       37.17
         50 |         29        0.29       37.46
         51 |         27        0.27       37.73
         52 |         25        0.25       37.98
         53 |         34        0.34       38.32
         54 |         19        0.19       38.51
         55 |         31        0.31       38.82
         56 |         23        0.23       39.05
         57 |         24        0.24       39.29
         58 |         21        0.21       39.50
         59 |         20        0.20       39.70
         99 |      6,030       60.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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