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

    RELATED |
   FACTOR 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,708       97.08       97.08
          1 |          7        0.07       97.15
          2 |         16        0.16       97.31
          3 |          1        0.01       97.32
          4 |          2        0.02       97.34
          5 |          5        0.05       97.39
          7 |          1        0.01       97.40
         15 |          3        0.03       97.43
         16 |          3        0.03       97.46
         18 |          4        0.04       97.50
         31 |          1        0.01       97.51
         99 |        249        2.49      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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