Frequencies for bus_use variable in vehnit dataset :

    BUS USE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,112       99.64       99.64
          5 |          2        0.18       99.82
          7 |          1        0.09       99.91
          9 |          1        0.09      100.00
------------+-----------------------------------
      Total |      1,116      100.00

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