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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         87        0.87        0.87
          2 |      7,013       70.13       71.00
          3 |        923        9.23       80.23
          4 |      1,344       13.44       93.67
          5 |        161        1.61       95.28
          6 |        275        2.75       98.03
          7 |         53        0.53       98.56
          9 |        144        1.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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