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

    ROADWAY |
    SURFACE |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        794        7.94        7.94
          2 |      8,853       88.53       96.47
          3 |          2        0.02       96.49
          4 |         70        0.70       97.19
          5 |        105        1.05       98.24
          8 |          8        0.08       98.32
          9 |        168        1.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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