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

    Vehicle |
 Trailering |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,608       86.08       86.08
          1 |        464        4.64       90.72
          2 |         56        0.56       91.28
          3 |          4        0.04       91.32
          9 |         47        0.47       91.79
          . |        821        8.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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