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

    Vehicle |
 Trailering |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,271       92.71       92.71
          1 |        595        5.95       98.66
          2 |         96        0.96       99.62
          3 |          1        0.01       99.63
          4 |          2        0.02       99.65
          9 |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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