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

 Crash Time |
   (MINUTE) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |        534        5.34        5.34
          1 |         97        0.97        6.31
          2 |        106        1.06        7.37
          3 |        124        1.24        8.61
          4 |        146        1.46       10.07
          5 |        327        3.27       13.34
          6 |         89        0.89       14.23
          7 |        189        1.89       16.12
          8 |        158        1.58       17.70
          9 |        124        1.24       18.94
         10 |        384        3.84       22.78
         11 |         70        0.70       23.48
         12 |        124        1.24       24.72
         13 |         89        0.89       25.61
         14 |        154        1.54       27.15
         15 |        434        4.34       31.49
         16 |        105        1.05       32.54
         17 |        126        1.26       33.80
         18 |        166        1.66       35.46
         19 |        101        1.01       36.47
         20 |        421        4.21       40.68
         21 |        101        1.01       41.69
         22 |        145        1.45       43.14
         23 |        118        1.18       44.32
         24 |         71        0.71       45.03
         25 |        354        3.54       48.57
         26 |         81        0.81       49.38
         27 |        117        1.17       50.55
         28 |        113        1.13       51.68
         29 |         84        0.84       52.52
         30 |        448        4.48       57.00
         31 |        109        1.09       58.09
         32 |         71        0.71       58.80
         33 |        105        1.05       59.85
         34 |         98        0.98       60.83
         35 |        336        3.36       64.19
         36 |         92        0.92       65.11
         37 |         85        0.85       65.96
         38 |        103        1.03       66.99
         39 |         79        0.79       67.78
         40 |        380        3.80       71.58
         41 |         62        0.62       72.20
         42 |        132        1.32       73.52
         43 |         91        0.91       74.43
         44 |         90        0.90       75.33
         45 |        410        4.10       79.43
         46 |         93        0.93       80.36
         47 |        117        1.17       81.53
         48 |        125        1.25       82.78
         49 |         89        0.89       83.67
         50 |        435        4.35       88.02
         51 |         80        0.80       88.82
         52 |         78        0.78       89.60
         53 |        129        1.29       90.89
         54 |         70        0.70       91.59
         55 |        314        3.14       94.73
         56 |         60        0.60       95.33
         57 |        110        1.10       96.43
         58 |        118        1.18       97.61
         59 |        106        1.06       98.67
         99 |        133        1.33      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016