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

Relation to |
    Roadway |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,149       61.49       61.49
          2 |      1,020       10.20       71.69
          3 |        243        2.43       74.12
          4 |      1,988       19.88       94.00
          5 |        469        4.69       98.69
          6 |         96        0.96       99.65
          9 |         35        0.35      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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