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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         96        0.96        0.96
          2 |      7,154       71.54       72.50
          3 |      1,017       10.17       82.67
          4 |      1,097       10.97       93.64
          5 |        207        2.07       95.71
          6 |        207        2.07       97.78
          7 |         44        0.44       98.22
          9 |        178        1.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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