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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        138        1.38        1.38
          2 |      6,730       67.30       68.68
          3 |      1,088       10.88       79.56
          4 |      1,373       13.73       93.29
          5 |        266        2.66       95.95
          6 |        158        1.58       97.53
          7 |         23        0.23       97.76
          9 |        224        2.24      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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