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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        110        1.10        1.10
          2 |      6,981       69.81       70.91
          3 |        816        8.16       79.07
          4 |      1,538       15.38       94.45
          5 |        161        1.61       96.06
          6 |        294        2.94       99.00
          7 |         37        0.37       99.37
          9 |         63        0.63      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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