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

    vehicle |
   trailing |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,514       85.14       85.14
          1 |        422        4.22       89.36
          2 |         21        0.21       89.57
          5 |          3        0.03       89.60
          6 |          6        0.06       89.66
          9 |         20        0.20       89.86
          . |      1,014       10.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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