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

    BUS USE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,870       98.70       98.70
          1 |         15        0.15       98.85
          2 |          1        0.01       98.86
          3 |          1        0.01       98.87
          4 |         28        0.28       99.15
          5 |          4        0.04       99.19
          6 |          6        0.06       99.25
          7 |          1        0.01       99.26
          8 |          1        0.01       99.27
          9 |         73        0.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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