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

relation to |
 trafficway |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      5,984       59.84       59.84
          2 |        204        2.04       61.88
          3 |        478        4.78       66.66
          4 |      2,425       24.25       90.91
          5 |        736        7.36       98.27
          6 |         61        0.61       98.88
          7 |         32        0.32       99.20
          8 |         34        0.34       99.54
         10 |          9        0.09       99.63
         11 |          7        0.07       99.70
         98 |          4        0.04       99.74
         99 |         26        0.26      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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