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

  Number of |
     Travel |
      Lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        128        1.28        1.28
          2 |      7,174       71.74       73.02
          3 |        714        7.14       80.16
          4 |      1,607       16.07       96.23
          5 |        118        1.18       97.41
          6 |        197        1.97       99.38
          7 |          7        0.07       99.45
          9 |         55        0.55      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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