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

    Vehicle |
   Trailing |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,550       85.50       85.50
          1 |        504        5.04       90.54
          2 |         27        0.27       90.81
          5 |          9        0.09       90.90
          9 |         13        0.13       91.03
          . |        897        8.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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