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

    BUS USE |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,934       99.34       99.34
          1 |         12        0.12       99.46
          2 |          1        0.01       99.47
          3 |          5        0.05       99.52
          4 |         21        0.21       99.73
          5 |         10        0.10       99.83
          6 |          3        0.03       99.86
          7 |          4        0.04       99.90
          8 |          1        0.01       99.91
          9 |          9        0.09      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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