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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        129        1.29        1.29
          2 |      6,881       68.81       70.10
          3 |      1,027       10.27       80.37
          4 |      1,266       12.66       93.03
          5 |        201        2.01       95.04
          6 |        239        2.39       97.43
          7 |         55        0.55       97.98
          9 |        202        2.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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