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

 crash time |
   (minute) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        563        5.63        5.63
          1 |        107        1.07        6.70
          2 |         80        0.80        7.50
          3 |        100        1.00        8.50
          4 |        100        1.00        9.50
          5 |        413        4.13       13.63
          6 |        124        1.24       14.87
          7 |        125        1.25       16.12
          8 |        128        1.28       17.40
          9 |         67        0.67       18.07
         10 |        348        3.48       21.55
         11 |         78        0.78       22.33
         12 |        126        1.26       23.59
         13 |         98        0.98       24.57
         14 |         73        0.73       25.30
         15 |        341        3.41       28.71
         16 |        127        1.27       29.98
         17 |        113        1.13       31.11
         18 |        112        1.12       32.23
         19 |         62        0.62       32.85
         20 |        423        4.23       37.08
         21 |         87        0.87       37.95
         22 |         83        0.83       38.78
         23 |        121        1.21       39.99
         24 |        114        1.14       41.13
         25 |        393        3.93       45.06
         26 |         78        0.78       45.84
         27 |        124        1.24       47.08
         28 |        102        1.02       48.10
         29 |         71        0.71       48.81
         30 |        548        5.48       54.29
         31 |         79        0.79       55.08
         32 |        130        1.30       56.38
         33 |        109        1.09       57.47
         34 |        107        1.07       58.54
         35 |        296        2.96       61.50
         36 |        117        1.17       62.67
         37 |        143        1.43       64.10
         38 |         89        0.89       64.99
         39 |         75        0.75       65.74
         40 |        399        3.99       69.73
         41 |        123        1.23       70.96
         42 |        105        1.05       72.01
         43 |         93        0.93       72.94
         44 |        104        1.04       73.98
         45 |        385        3.85       77.83
         46 |         82        0.82       78.65
         47 |        133        1.33       79.98
         48 |        161        1.61       81.59
         49 |        125        1.25       82.84
         50 |        372        3.72       86.56
         51 |         95        0.95       87.51
         52 |        104        1.04       88.55
         53 |        111        1.11       89.66
         54 |        115        1.15       90.81
         55 |        302        3.02       93.83
         56 |        108        1.08       94.91
         57 |        126        1.26       96.17
         58 |        131        1.31       97.48
         59 |        119        1.19       98.67
         99 |        133        1.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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