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

    Roadway |
    Surface |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,429       84.29       84.29
          2 |      1,339       13.39       97.68
          3 |         59        0.59       98.27
          4 |         73        0.73       99.00
          5 |         35        0.35       99.35
          8 |         17        0.17       99.52
          9 |         48        0.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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