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

    Roadway |
  Alignment |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         11        0.11        0.11
          1 |      7,957       79.57       79.68
          2 |        861        8.61       88.29
          3 |        899        8.99       97.28
          4 |        111        1.11       98.39
          8 |         53        0.53       98.92
          9 |        108        1.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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