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

    bus use |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,939       99.39       99.39
          1 |         14        0.14       99.53
          4 |          2        0.02       99.55
          5 |         11        0.11       99.66
          6 |         18        0.18       99.84
         98 |          1        0.01       99.85
         99 |         15        0.15      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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