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

Relation To |
 Trafficway |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,916       59.16       59.16
          2 |        231        2.31       61.47
          3 |        502        5.02       66.49
          4 |      2,699       26.99       93.48
          5 |        252        2.52       96.00
          6 |        258        2.58       98.58
          7 |         29        0.29       98.87
          8 |         46        0.46       99.33
         10 |          6        0.06       99.39
         11 |          8        0.08       99.47
         98 |          1        0.01       99.48
         99 |         52        0.52      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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