Frequencies for first 10,000 rows of seq4 variable in vehicle dataset :

    EVENT 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      7,563       75.63       75.63
          1 |        663        6.63       82.26
          2 |         67        0.67       82.93
          3 |         18        0.18       83.11
          4 |          1        0.01       83.12
          7 |          3        0.03       83.15
          8 |         33        0.33       83.48
          9 |          3        0.03       83.51
         10 |          1        0.01       83.52
         12 |        132        1.32       84.84
         13 |         18        0.18       85.02
         14 |         35        0.35       85.37
         15 |          1        0.01       85.38
         17 |         17        0.17       85.55
         18 |         12        0.12       85.67
         19 |         13        0.13       85.80
         20 |          2        0.02       85.82
         21 |          6        0.06       85.88
         22 |          2        0.02       85.90
         23 |         13        0.13       86.03
         24 |         49        0.49       86.52
         25 |         38        0.38       86.90
         27 |         37        0.37       87.27
         28 |          3        0.03       87.30
         29 |         21        0.21       87.51
         30 |         64        0.64       88.15
         31 |         27        0.27       88.42
         32 |         12        0.12       88.54
         33 |         61        0.61       89.15
         34 |         72        0.72       89.87
         35 |         52        0.52       90.39
         36 |          7        0.07       90.46
         37 |         15        0.15       90.61
         38 |        143        1.43       92.04
         39 |         37        0.37       92.41
         40 |          3        0.03       92.44
         41 |         18        0.18       92.62
         42 |        245        2.45       95.07
         43 |         44        0.44       95.51
         46 |         20        0.20       95.71
         47 |          1        0.01       95.72
         49 |          1        0.01       95.73
         51 |          9        0.09       95.82
         52 |          1        0.01       95.83
         53 |         13        0.13       95.96
         54 |         12        0.12       96.08
         57 |          2        0.02       96.10
         60 |          3        0.03       96.13
         62 |          6        0.06       96.19
         63 |         95        0.95       97.14
         64 |        126        1.26       98.40
         65 |         58        0.58       98.98
         67 |         90        0.90       99.88
         99 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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