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

    roadway |
  alignment |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         76        0.76        0.76
          1 |      7,160       71.60       72.36
          2 |        841        8.41       80.77
          3 |        977        9.77       90.54
          4 |         45        0.45       90.99
          8 |        789        7.89       98.88
          9 |        112        1.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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