Frequencies for first 10,000 rows of bus_use variable in vehicle dataset :

    bus use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,933       99.33       99.33
          1 |         22        0.22       99.55
          4 |          2        0.02       99.57
          5 |          7        0.07       99.64
          6 |         16        0.16       99.80
          7 |          6        0.06       99.86
          8 |          1        0.01       99.87
         99 |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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