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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         89        0.89        0.89
          2 |      6,950       69.50       70.39
          3 |      1,089       10.89       81.28
          4 |      1,178       11.78       93.06
          5 |        224        2.24       95.30
          6 |        246        2.46       97.76
          7 |         49        0.49       98.25
          9 |        175        1.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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