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

      Class |
 Trafficway |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,052       10.52       10.52
          2 |      1,250       12.50       23.02
          3 |      2,591       25.91       48.93
          4 |      1,964       19.64       68.57
          5 |      3,036       30.36       98.93
          8 |         95        0.95       99.88
          9 |         12        0.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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