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

      Class |
 Trafficway |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,081       10.81       10.81
          2 |      1,322       13.22       24.03
          3 |      2,667       26.67       50.70
          4 |      1,792       17.92       68.62
          5 |      3,035       30.35       98.97
          8 |         85        0.85       99.82
          9 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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