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

    Roadway |
    Surface |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,859       88.59       88.59
          2 |        937        9.37       97.96
          3 |         47        0.47       98.43
          4 |         87        0.87       99.30
          5 |         38        0.38       99.68
          8 |          9        0.09       99.77
          9 |         23        0.23      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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