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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        143        1.43        1.43
          2 |      7,190       71.90       73.33
          3 |        810        8.10       81.43
          4 |      1,405       14.05       95.48
          5 |        134        1.34       96.82
          6 |        241        2.41       99.23
          7 |         24        0.24       99.47
          9 |         53        0.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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