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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,577       65.77       65.77
          2 |      2,731       27.31       93.08
          3 |        491        4.91       97.99
          4 |        128        1.28       99.27
          5 |         50        0.50       99.77
          6 |         13        0.13       99.90
          7 |          6        0.06       99.96
          8 |          1        0.01       99.97
          9 |          1        0.01       99.98
         10 |          1        0.01       99.99
         11 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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