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

    RELATED |
   FACTOR 1 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,655       86.55       86.55
          1 |        204        2.04       88.59
          2 |        115        1.15       89.74
          3 |         16        0.16       89.90
          4 |          5        0.05       89.95
          5 |         13        0.13       90.08
          7 |         13        0.13       90.21
          8 |          3        0.03       90.24
          9 |          5        0.05       90.29
         11 |          1        0.01       90.30
         12 |          1        0.01       90.31
         13 |          1        0.01       90.32
         14 |          1        0.01       90.33
         15 |          4        0.04       90.37
         16 |          6        0.06       90.43
         18 |         18        0.18       90.61
         31 |        466        4.66       95.27
         32 |         22        0.22       95.49
         33 |          4        0.04       95.53
         99 |        447        4.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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