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

    Roadway |
    Surface |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,876       88.76       88.76
          2 |        892        8.92       97.68
          3 |         41        0.41       98.09
          4 |         68        0.68       98.77
          5 |         50        0.50       99.27
          8 |         16        0.16       99.43
          9 |         57        0.57      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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