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

    Roadway |
    Surface |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,782       87.82       87.82
          2 |      1,029       10.29       98.11
          3 |         56        0.56       98.67
          4 |         75        0.75       99.42
          5 |         28        0.28       99.70
          8 |         12        0.12       99.82
          9 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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