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

  VEHICLE # |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,644       66.44       66.44
          2 |      2,655       26.55       92.99
          3 |        482        4.82       97.81
          4 |        137        1.37       99.18
          5 |         43        0.43       99.61
          6 |         13        0.13       99.74
          7 |          8        0.08       99.82
          8 |          7        0.07       99.89
          9 |          4        0.04       99.93
         10 |          3        0.03       99.96
         11 |          3        0.03       99.99
         12 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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