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

    Vehicle |
 Trailering |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,745       87.45       87.45
          1 |        442        4.42       91.87
          2 |         37        0.37       92.24
          9 |         53        0.53       92.77
          . |        723        7.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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