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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        171        1.71        1.71
          2 |      6,868       68.68       70.39
          3 |      1,115       11.15       81.54
          4 |      1,251       12.51       94.05
          5 |        219        2.19       96.24
          6 |        180        1.80       98.04
          7 |         32        0.32       98.36
          9 |        164        1.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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