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

    RELATED |
   FACTOR 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,914       89.14       89.14
          1 |        228        2.28       91.42
          2 |        116        1.16       92.58
          3 |         17        0.17       92.75
          4 |          4        0.04       92.79
          5 |          8        0.08       92.87
          6 |          2        0.02       92.89
          7 |          9        0.09       92.98
          8 |          5        0.05       93.03
          9 |          9        0.09       93.12
         12 |          6        0.06       93.18
         13 |          3        0.03       93.21
         14 |          6        0.06       93.27
         15 |          3        0.03       93.30
         16 |          2        0.02       93.32
         17 |          2        0.02       93.34
         18 |         29        0.29       93.63
         31 |        388        3.88       97.51
         32 |         18        0.18       97.69
         33 |          3        0.03       97.72
         34 |         11        0.11       97.83
         35 |          4        0.04       97.87
         99 |        213        2.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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