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

  Number of |
     Travel |
      Lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        112        1.12        1.12
          2 |      7,535       75.35       76.47
          3 |        747        7.47       83.94
          4 |      1,308       13.08       97.02
          5 |        116        1.16       98.18
          6 |        128        1.28       99.46
          7 |          3        0.03       99.49
          9 |         51        0.51      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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