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

    Roadway |
  Alignment |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         26        0.26        0.26
          1 |      7,740       77.40       77.66
          2 |        863        8.63       86.29
          3 |      1,094       10.94       97.23
          4 |         70        0.70       97.93
          8 |        133        1.33       99.26
          9 |         74        0.74      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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