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

    EVENT 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,927       39.27       39.27
          1 |        653        6.53       45.80
          2 |         64        0.64       46.44
          3 |          6        0.06       46.50
          5 |         13        0.13       46.63
          7 |          4        0.04       46.67
          8 |        105        1.05       47.72
          9 |         20        0.20       47.92
         11 |          3        0.03       47.95
         12 |      1,109       11.09       59.04
         13 |         21        0.21       59.25
         14 |         58        0.58       59.83
         15 |          2        0.02       59.85
         17 |         12        0.12       59.97
         18 |         15        0.15       60.12
         19 |          8        0.08       60.20
         20 |          6        0.06       60.26
         21 |         11        0.11       60.37
         22 |          2        0.02       60.39
         23 |         13        0.13       60.52
         24 |        129        1.29       61.81
         25 |         79        0.79       62.60
         26 |          3        0.03       62.63
         27 |         92        0.92       63.55
         28 |          5        0.05       63.60
         29 |         22        0.22       63.82
         30 |         85        0.85       64.67
         31 |         52        0.52       65.19
         32 |         48        0.48       65.67
         33 |        302        3.02       68.69
         34 |        134        1.34       70.03
         35 |         61        0.61       70.64
         36 |         17        0.17       70.81
         37 |         27        0.27       71.08
         38 |         66        0.66       71.74
         39 |         36        0.36       72.10
         40 |          4        0.04       72.14
         41 |         15        0.15       72.29
         42 |        309        3.09       75.38
         43 |         43        0.43       75.81
         45 |          1        0.01       75.82
         46 |         12        0.12       75.94
         47 |          1        0.01       75.95
         51 |         13        0.13       76.08
         52 |         35        0.35       76.43
         53 |         30        0.30       76.73
         54 |         32        0.32       77.05
         57 |          2        0.02       77.07
         60 |          4        0.04       77.11
         61 |          9        0.09       77.20
         62 |          4        0.04       77.24
         63 |        970        9.70       86.94
         64 |        775        7.75       94.69
         65 |        451        4.51       99.20
         66 |          1        0.01       99.21
         67 |         58        0.58       99.79
         99 |         21        0.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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