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

    Vehicle |
 Trailering |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,312       93.12       93.12
          1 |        549        5.49       98.61
          4 |          1        0.01       98.62
          5 |         87        0.87       99.49
          9 |         51        0.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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