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

    vehicle |
   trailing |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,540       85.40       85.40
          1 |        453        4.53       89.93
          2 |         31        0.31       90.24
          4 |          5        0.05       90.29
          5 |          2        0.02       90.31
          6 |          9        0.09       90.40
          9 |          7        0.07       90.47
          . |        953        9.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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