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

    Vehicle |
     Number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,794       67.94       67.94
          2 |      2,611       26.11       94.05
          3 |        413        4.13       98.18
          4 |        107        1.07       99.25
          5 |         43        0.43       99.68
          6 |         16        0.16       99.84
          7 |          7        0.07       99.91
          8 |          4        0.04       99.95
          9 |          3        0.03       99.98
         10 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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