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

 crash time |
   (minute) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        498        4.98        4.98
          1 |         69        0.69        5.67
          2 |         89        0.89        6.56
          3 |         72        0.72        7.28
          4 |         94        0.94        8.22
          5 |        343        3.43       11.65
          6 |        124        1.24       12.89
          7 |         70        0.70       13.59
          8 |        143        1.43       15.02
          9 |         82        0.82       15.84
         10 |        409        4.09       19.93
         11 |         95        0.95       20.88
         12 |        132        1.32       22.20
         13 |         88        0.88       23.08
         14 |         96        0.96       24.04
         15 |        378        3.78       27.82
         16 |         88        0.88       28.70
         17 |        105        1.05       29.75
         18 |        140        1.40       31.15
         19 |         88        0.88       32.03
         20 |        378        3.78       35.81
         21 |         62        0.62       36.43
         22 |        116        1.16       37.59
         23 |        108        1.08       38.67
         24 |        120        1.20       39.87
         25 |        381        3.81       43.68
         26 |         99        0.99       44.67
         27 |        101        1.01       45.68
         28 |        121        1.21       46.89
         29 |         89        0.89       47.78
         30 |        509        5.09       52.87
         31 |         79        0.79       53.66
         32 |        108        1.08       54.74
         33 |        118        1.18       55.92
         34 |        132        1.32       57.24
         35 |        332        3.32       60.56
         36 |         76        0.76       61.32
         37 |        116        1.16       62.48
         38 |        129        1.29       63.77
         39 |         98        0.98       64.75
         40 |        414        4.14       68.89
         41 |        144        1.44       70.33
         42 |         58        0.58       70.91
         43 |        138        1.38       72.29
         44 |         96        0.96       73.25
         45 |        450        4.50       77.75
         46 |        134        1.34       79.09
         47 |         96        0.96       80.05
         48 |        106        1.06       81.11
         49 |        109        1.09       82.20
         50 |        439        4.39       86.59
         51 |        106        1.06       87.65
         52 |        135        1.35       89.00
         53 |        140        1.40       90.40
         54 |        110        1.10       91.50
         55 |        324        3.24       94.74
         56 |        102        1.02       95.76
         57 |        128        1.28       97.04
         58 |        116        1.16       98.20
         59 |         81        0.81       99.01
         99 |         99        0.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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