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

    Vehicle |
 Trailering |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,625       86.25       86.25
          1 |        476        4.76       91.01
          2 |         40        0.40       91.41
          4 |          2        0.02       91.43
          9 |         36        0.36       91.79
          . |        821        8.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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