Frequencies for first 10,000 rows of vsurcond variable in vehicle dataset :

    roadway |
    surface |
  condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         63        0.63        0.63
          1 |      8,997       89.97       90.60
          2 |        733        7.33       97.93
          3 |         26        0.26       98.19
          4 |         52        0.52       98.71
          5 |          1        0.01       98.72
          6 |          5        0.05       98.77
          8 |          1        0.01       98.78
         10 |          9        0.09       98.87
         11 |         12        0.12       98.99
         98 |         17        0.17       99.16
         99 |         84        0.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016