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

    RELATED |
   FACTOR 2 |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,973       99.73       99.73
          2 |          2        0.02       99.75
          3 |          1        0.01       99.76
          4 |          3        0.03       99.79
         15 |          1        0.01       99.80
         35 |          3        0.03       99.83
         36 |          1        0.01       99.84
         99 |         16        0.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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