Frequencies for first 10,000 rows of veh_cf1 variable in vehicle dataset :

    RELATED |
   FACTOR 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,766       87.66       87.66
          1 |        117        1.17       88.83
          2 |         48        0.48       89.31
          3 |          6        0.06       89.37
          4 |          4        0.04       89.41
          5 |          7        0.07       89.48
          7 |         11        0.11       89.59
          8 |          3        0.03       89.62
          9 |          6        0.06       89.68
         10 |          1        0.01       89.69
         12 |          1        0.01       89.70
         13 |          1        0.01       89.71
         14 |          1        0.01       89.72
         15 |          6        0.06       89.78
         16 |          2        0.02       89.80
         17 |         17        0.17       89.97
         18 |         11        0.11       90.08
         19 |          7        0.07       90.15
         31 |        387        3.87       94.02
         32 |         15        0.15       94.17
         33 |          3        0.03       94.20
         34 |         35        0.35       94.55
         35 |          6        0.06       94.61
         36 |          4        0.04       94.65
         38 |        321        3.21       97.86
         39 |          2        0.02       97.88
         99 |        212        2.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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