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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        104        1.04        1.04
          2 |      6,848       68.48       69.52
          3 |        919        9.19       78.71
          4 |      1,441       14.41       93.12
          5 |        174        1.74       94.86
          6 |        310        3.10       97.96
          7 |         38        0.38       98.34
          9 |        166        1.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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