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

      Towed |
   Trailing |
       Unit |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,110       91.10       91.10
          1 |         98        0.98       92.08
          . |        792        7.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016