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

    VEHICLE |
   TRAILING |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      8,773       87.73       87.73
          1 |        431        4.31       92.04
          2 |         30        0.30       92.34
          4 |          2        0.02       92.36
          5 |          1        0.01       92.37
          9 |          8        0.08       92.45
          . |        755        7.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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