Frequencies for first 10,000 rows of seq2 variable in vehicle dataset :

    EVENT 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,965       39.65       39.65
          1 |        633        6.33       45.98
          2 |         69        0.69       46.67
          3 |          3        0.03       46.70
          5 |          6        0.06       46.76
          7 |          1        0.01       46.77
          8 |         93        0.93       47.70
          9 |         18        0.18       47.88
         10 |          3        0.03       47.91
         11 |          2        0.02       47.93
         12 |      1,138       11.38       59.31
         13 |         32        0.32       59.63
         14 |         73        0.73       60.36
         15 |          4        0.04       60.40
         16 |          1        0.01       60.41
         17 |         22        0.22       60.63
         18 |         24        0.24       60.87
         19 |          8        0.08       60.95
         20 |          7        0.07       61.02
         21 |          9        0.09       61.11
         22 |          5        0.05       61.16
         23 |         19        0.19       61.35
         24 |        132        1.32       62.67
         25 |         64        0.64       63.31
         26 |          1        0.01       63.32
         27 |         91        0.91       64.23
         28 |          2        0.02       64.25
         29 |         11        0.11       64.36
         30 |         83        0.83       65.19
         31 |         46        0.46       65.65
         32 |         45        0.45       66.10
         33 |        338        3.38       69.48
         34 |        157        1.57       71.05
         35 |         78        0.78       71.83
         36 |         12        0.12       71.95
         37 |         13        0.13       72.08
         38 |         59        0.59       72.67
         39 |         30        0.30       72.97
         40 |          6        0.06       73.03
         41 |         15        0.15       73.18
         42 |        254        2.54       75.72
         43 |         47        0.47       76.19
         44 |          1        0.01       76.20
         45 |          2        0.02       76.22
         46 |         13        0.13       76.35
         48 |          3        0.03       76.38
         49 |          1        0.01       76.39
         50 |          1        0.01       76.40
         51 |         26        0.26       76.66
         52 |         23        0.23       76.89
         53 |         31        0.31       77.20
         54 |         60        0.60       77.80
         57 |          2        0.02       77.82
         60 |          8        0.08       77.90
         61 |          3        0.03       77.93
         62 |          8        0.08       78.01
         63 |        835        8.35       86.36
         64 |        800        8.00       94.36
         65 |        483        4.83       99.19
         66 |          2        0.02       99.21
         67 |         67        0.67       99.88
         99 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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