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

    Vehicle |
 Trailering |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,192       91.92       91.92
          1 |        620        6.20       98.12
          2 |        107        1.07       99.19
          3 |          4        0.04       99.23
          4 |          3        0.03       99.26
          9 |         74        0.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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