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

  Number of |
     Travel |
      Lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        158        1.58        1.58
          2 |      6,861       68.61       70.19
          3 |        712        7.12       77.31
          4 |      1,770       17.70       95.01
          5 |        151        1.51       96.52
          6 |        276        2.76       99.28
          7 |         24        0.24       99.52
          9 |         48        0.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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