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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        143        1.43        1.43
          2 |      6,691       66.91       68.34
          3 |        714        7.14       75.48
          4 |      1,680       16.80       92.28
          5 |        163        1.63       93.91
          6 |        370        3.70       97.61
          7 |         53        0.53       98.14
          9 |        186        1.86      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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