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

 crash time |
   (minute) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        502        5.02        5.02
          1 |        152        1.52        6.54
          2 |         97        0.97        7.51
          3 |        106        1.06        8.57
          4 |        109        1.09        9.66
          5 |        324        3.24       12.90
          6 |        126        1.26       14.16
          7 |        141        1.41       15.57
          8 |        102        1.02       16.59
          9 |        120        1.20       17.79
         10 |        328        3.28       21.07
         11 |         99        0.99       22.06
         12 |        137        1.37       23.43
         13 |        122        1.22       24.65
         14 |        130        1.30       25.95
         15 |        383        3.83       29.78
         16 |         92        0.92       30.70
         17 |        114        1.14       31.84
         18 |        128        1.28       33.12
         19 |        119        1.19       34.31
         20 |        436        4.36       38.67
         21 |        102        1.02       39.69
         22 |        143        1.43       41.12
         23 |        111        1.11       42.23
         24 |        135        1.35       43.58
         25 |        374        3.74       47.32
         26 |         92        0.92       48.24
         27 |        127        1.27       49.51
         28 |         88        0.88       50.39
         29 |         91        0.91       51.30
         30 |        532        5.32       56.62
         31 |         87        0.87       57.49
         32 |        102        1.02       58.51
         33 |         97        0.97       59.48
         34 |        126        1.26       60.74
         35 |        298        2.98       63.72
         36 |         70        0.70       64.42
         37 |         86        0.86       65.28
         38 |        137        1.37       66.65
         39 |         99        0.99       67.64
         40 |        350        3.50       71.14
         41 |         57        0.57       71.71
         42 |        114        1.14       72.85
         43 |         77        0.77       73.62
         44 |         82        0.82       74.44
         45 |        417        4.17       78.61
         46 |         96        0.96       79.57
         47 |        102        1.02       80.59
         48 |        125        1.25       81.84
         49 |         97        0.97       82.81
         50 |        480        4.80       87.61
         51 |         81        0.81       88.42
         52 |        103        1.03       89.45
         53 |        118        1.18       90.63
         54 |         81        0.81       91.44
         55 |        317        3.17       94.61
         56 |         93        0.93       95.54
         57 |        133        1.33       96.87
         58 |        114        1.14       98.01
         59 |        115        1.15       99.16
         99 |         84        0.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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