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

  Number of |
     Travel |
      Lanes |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        169        1.69        1.69
          2 |      6,870       68.70       70.39
          3 |        777        7.77       78.16
          4 |      1,708       17.08       95.24
          5 |        147        1.47       96.71
          6 |        245        2.45       99.16
          7 |         30        0.30       99.46
          9 |         54        0.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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