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

    Roadway |
    Surface |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,862       88.62       88.62
          2 |        980        9.80       98.42
          3 |         27        0.27       98.69
          4 |         51        0.51       99.20
          5 |         46        0.46       99.66
          8 |         16        0.16       99.82
          9 |         18        0.18      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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