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

    vehicle |
     number |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,573       65.73       65.73
          2 |      2,690       26.90       92.63
          3 |        494        4.94       97.57
          4 |        139        1.39       98.96
          5 |         51        0.51       99.47
          6 |         29        0.29       99.76
          7 |         12        0.12       99.88
          8 |          8        0.08       99.96
          9 |          3        0.03       99.99
         10 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016