Frequencies for first 10,000 rows of veh_sc2 variable in vehicle dataset :

    vehicle |
    related |
factors (2) |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,943       99.43       99.43
         30 |          1        0.01       99.44
         44 |          1        0.01       99.45
         99 |         55        0.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016