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

 Trafficway |
Description |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         26        0.26        0.26
          1 |      5,092       50.92       51.18
          2 |      2,211       22.11       73.29
          3 |      1,605       16.05       89.34
          4 |         75        0.75       90.09
          5 |        690        6.90       96.99
          6 |        156        1.56       98.55
          8 |         46        0.46       99.01
          9 |         99        0.99      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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