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

  Number of |
     Travel |
      Lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        108        1.08        1.08
          2 |      7,679       76.79       77.87
          3 |        574        5.74       83.61
          4 |      1,276       12.76       96.37
          5 |        118        1.18       97.55
          8 |        103        1.03       98.58
          9 |        142        1.42      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016