Frequencies for first 10,000 rows of seq1 variable in vehicle dataset :

    EVENT 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        177        1.77        1.77
          2 |          1        0.01        1.78
          5 |         29        0.29        2.07
          7 |         17        0.17        2.24
          8 |        899        8.99       11.23
          9 |        133        1.33       12.56
         10 |         28        0.28       12.84
         11 |         17        0.17       13.01
         12 |      4,757       47.57       60.58
         13 |          8        0.08       60.66
         14 |         22        0.22       60.88
         15 |         22        0.22       61.10
         18 |         22        0.22       61.32
         20 |          1        0.01       61.33
         21 |          1        0.01       61.34
         23 |          1        0.01       61.35
         24 |          9        0.09       61.44
         25 |          4        0.04       61.48
         26 |          1        0.01       61.49
         27 |          1        0.01       61.50
         28 |         11        0.11       61.61
         29 |          1        0.01       61.62
         30 |          2        0.02       61.64
         31 |          1        0.01       61.65
         32 |          4        0.04       61.69
         33 |         27        0.27       61.96
         34 |          3        0.03       61.99
         35 |          3        0.03       62.02
         36 |          3        0.03       62.05
         39 |          3        0.03       62.08
         42 |          1        0.01       62.09
         43 |          6        0.06       62.15
         44 |          4        0.04       62.19
         46 |          3        0.03       62.22
         47 |          1        0.01       62.23
         51 |          6        0.06       62.29
         52 |          1        0.01       62.30
         54 |         98        0.98       63.28
         60 |          4        0.04       63.32
         61 |         56        0.56       63.88
         62 |          1        0.01       63.89
         63 |      1,704       17.04       80.93
         64 |        666        6.66       87.59
         65 |      1,210       12.10       99.69
         67 |         13        0.13       99.82
         99 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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