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

    EVENT 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      4,206       42.06       42.06
          1 |        631        6.31       48.37
          2 |         90        0.90       49.27
          3 |          8        0.08       49.35
          5 |          5        0.05       49.40
          6 |          1        0.01       49.41
          7 |          4        0.04       49.45
          8 |        100        1.00       50.45
          9 |         13        0.13       50.58
         10 |          1        0.01       50.59
         12 |      1,100       11.00       61.59
         13 |         22        0.22       61.81
         14 |        116        1.16       62.97
         15 |          1        0.01       62.98
         16 |          1        0.01       62.99
         17 |         19        0.19       63.18
         18 |         24        0.24       63.42
         19 |          5        0.05       63.47
         20 |          8        0.08       63.55
         21 |         16        0.16       63.71
         22 |          1        0.01       63.72
         23 |         22        0.22       63.94
         24 |        126        1.26       65.20
         25 |         57        0.57       65.77
         26 |          4        0.04       65.81
         27 |         69        0.69       66.50
         28 |          1        0.01       66.51
         29 |         22        0.22       66.73
         30 |         66        0.66       67.39
         31 |         18        0.18       67.57
         32 |         28        0.28       67.85
         33 |        300        3.00       70.85
         34 |        109        1.09       71.94
         35 |         75        0.75       72.69
         36 |         19        0.19       72.88
         37 |         23        0.23       73.11
         38 |         53        0.53       73.64
         39 |         19        0.19       73.83
         40 |          5        0.05       73.88
         41 |         15        0.15       74.03
         42 |        216        2.16       76.19
         43 |         63        0.63       76.82
         45 |          1        0.01       76.83
         46 |         17        0.17       77.00
         47 |          7        0.07       77.07
         50 |          2        0.02       77.09
         51 |         10        0.10       77.19
         52 |         19        0.19       77.38
         53 |          8        0.08       77.46
         54 |         70        0.70       78.16
         60 |          9        0.09       78.25
         61 |          3        0.03       78.28
         62 |          4        0.04       78.32
         63 |        840        8.40       86.72
         64 |        743        7.43       94.15
         65 |        464        4.64       98.79
         66 |         13        0.13       98.92
         67 |         67        0.67       99.59
         99 |         41        0.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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