Frequencies for first 10,000 rows of veh_cf2 variable in vehicle dataset :

    RELATED |
   FACTOR 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,940       99.40       99.40
          3 |          2        0.02       99.42
          4 |          4        0.04       99.46
          7 |          1        0.01       99.47
         14 |          1        0.01       99.48
         18 |          1        0.01       99.49
         31 |          2        0.02       99.51
         32 |          2        0.02       99.53
         33 |          2        0.02       99.55
         35 |          4        0.04       99.59
         99 |         41        0.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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