Frequencies for first 10,000 rows of tow_veh variable in person dataset :

    Vehicle |
 Trailering |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,675       86.75       86.75
          1 |        414        4.14       90.89
          2 |         44        0.44       91.33
          3 |          5        0.05       91.38
          9 |         42        0.42       91.80
          . |        820        8.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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