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

      lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         97        0.97        0.97
          2 |      7,051       70.51       71.48
          3 |      1,063       10.63       82.11
          4 |      1,172       11.72       93.83
          5 |        199        1.99       95.82
          6 |        224        2.24       98.06
          7 |         46        0.46       98.52
          9 |        148        1.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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