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

    Roadway |
    Surface |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,768       87.68       87.68
          2 |      1,012       10.12       97.80
          3 |         61        0.61       98.41
          4 |         65        0.65       99.06
          5 |         38        0.38       99.44
          8 |         12        0.12       99.56
          9 |         44        0.44      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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