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

Relation to |
    Roadway |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,092       60.92       60.92
          2 |      1,072       10.72       71.64
          3 |        291        2.91       74.55
          4 |      1,939       19.39       93.94
          5 |        109        1.09       95.03
          6 |        463        4.63       99.66
          9 |         34        0.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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