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

    Roadway |
    Surface |
  Condition |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,769       87.69       87.69
          2 |        873        8.73       96.42
          3 |         36        0.36       96.78
          4 |         63        0.63       97.41
          5 |         37        0.37       97.78
          8 |         10        0.10       97.88
          9 |        212        2.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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