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

    Vehicle |
 Trailering |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,215       92.15       92.15
          1 |        610        6.10       98.25
          2 |        117        1.17       99.42
          3 |          3        0.03       99.45
          4 |          1        0.01       99.46
          9 |         54        0.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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