Frequencies for first 10,000 rows of rel_road variable in accident dataset :

Relation to |
    Roadway |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,161       61.61       61.61
          2 |      1,225       12.25       73.86
          3 |        255        2.55       76.41
          4 |      1,772       17.72       94.13
          5 |        466        4.66       98.79
          6 |         99        0.99       99.78
          9 |         22        0.22      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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