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

 trafficway |
description |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         65        0.65        0.65
          1 |      4,862       48.62       49.27
          2 |      2,144       21.44       70.71
          3 |      1,730       17.30       88.01
          4 |         69        0.69       88.70
          5 |        845        8.45       97.15
          6 |        191        1.91       99.06
          8 |         47        0.47       99.53
          9 |         47        0.47      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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