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

    Roadway |
    Surface |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        712        7.12        7.12
          2 |      7,996       79.96       87.08
          3 |          1        0.01       87.09
          4 |        193        1.93       89.02
          5 |        114        1.14       90.16
          8 |         16        0.16       90.32
          9 |        968        9.68      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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