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

   crash to |
      death |
    minutes |
  (minutes) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,920       19.20       19.20
          1 |         40        0.40       19.60
          2 |         40        0.40       20.00
          3 |         37        0.37       20.37
          4 |         43        0.43       20.80
          5 |         59        0.59       21.39
          6 |         30        0.30       21.69
          7 |         41        0.41       22.10
          8 |         37        0.37       22.47
          9 |         44        0.44       22.91
         10 |         46        0.46       23.37
         11 |         42        0.42       23.79
         12 |         41        0.41       24.20
         13 |         40        0.40       24.60
         14 |         47        0.47       25.07
         15 |         48        0.48       25.55
         16 |         45        0.45       26.00
         17 |         44        0.44       26.44
         18 |         35        0.35       26.79
         19 |         24        0.24       27.03
         20 |         49        0.49       27.52
         21 |         39        0.39       27.91
         22 |         46        0.46       28.37
         23 |         41        0.41       28.78
         24 |         26        0.26       29.04
         25 |         47        0.47       29.51
         26 |         34        0.34       29.85
         27 |         29        0.29       30.14
         28 |         33        0.33       30.47
         29 |         38        0.38       30.85
         30 |         53        0.53       31.38
         31 |         29        0.29       31.67
         32 |         36        0.36       32.03
         33 |         24        0.24       32.27
         34 |         31        0.31       32.58
         35 |         44        0.44       33.02
         36 |         28        0.28       33.30
         37 |         38        0.38       33.68
         38 |         32        0.32       34.00
         39 |         31        0.31       34.31
         40 |         42        0.42       34.73
         41 |         28        0.28       35.01
         42 |         27        0.27       35.28
         43 |         34        0.34       35.62
         44 |         38        0.38       36.00
         45 |         40        0.40       36.40
         46 |         30        0.30       36.70
         47 |         22        0.22       36.92
         48 |         29        0.29       37.21
         49 |         31        0.31       37.52
         50 |         36        0.36       37.88
         51 |         26        0.26       38.14
         52 |         24        0.24       38.38
         53 |         36        0.36       38.74
         54 |         30        0.30       39.04
         55 |         37        0.37       39.41
         56 |         23        0.23       39.64
         57 |         27        0.27       39.91
         58 |         21        0.21       40.12
         59 |         22        0.22       40.34
         99 |      5,966       59.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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