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

 crash time |
   (minute) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        504        5.04        5.04
          1 |         76        0.76        5.80
          2 |         89        0.89        6.69
          3 |        120        1.20        7.89
          4 |         98        0.98        8.87
          5 |        386        3.86       12.73
          6 |        114        1.14       13.87
          7 |         99        0.99       14.86
          8 |        127        1.27       16.13
          9 |        153        1.53       17.66
         10 |        444        4.44       22.10
         11 |        106        1.06       23.16
         12 |        120        1.20       24.36
         13 |        142        1.42       25.78
         14 |        113        1.13       26.91
         15 |        364        3.64       30.55
         16 |         93        0.93       31.48
         17 |        115        1.15       32.63
         18 |        134        1.34       33.97
         19 |         99        0.99       34.96
         20 |        396        3.96       38.92
         21 |         77        0.77       39.69
         22 |         92        0.92       40.61
         23 |        128        1.28       41.89
         24 |         81        0.81       42.70
         25 |        310        3.10       45.80
         26 |         99        0.99       46.79
         27 |        105        1.05       47.84
         28 |        128        1.28       49.12
         29 |        131        1.31       50.43
         30 |        425        4.25       54.68
         31 |         56        0.56       55.24
         32 |        132        1.32       56.56
         33 |        104        1.04       57.60
         34 |         94        0.94       58.54
         35 |        291        2.91       61.45
         36 |         89        0.89       62.34
         37 |        110        1.10       63.44
         38 |        155        1.55       64.99
         39 |         66        0.66       65.65
         40 |        405        4.05       69.70
         41 |         77        0.77       70.47
         42 |         88        0.88       71.35
         43 |        139        1.39       72.74
         44 |         93        0.93       73.67
         45 |        503        5.03       78.70
         46 |         83        0.83       79.53
         47 |        120        1.20       80.73
         48 |        142        1.42       82.15
         49 |         97        0.97       83.12
         50 |        350        3.50       86.62
         51 |        108        1.08       87.70
         52 |        107        1.07       88.77
         53 |        123        1.23       90.00
         54 |         97        0.97       90.97
         55 |        332        3.32       94.29
         56 |        113        1.13       95.42
         57 |        140        1.40       96.82
         58 |        129        1.29       98.11
         59 |         97        0.97       99.08
         99 |         92        0.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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