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

    ROADWAY |
    SURFACE |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        635        6.35        6.35
          2 |      9,069       90.69       97.04
          3 |          4        0.04       97.08
          4 |        116        1.16       98.24
          5 |        120        1.20       99.44
          8 |          6        0.06       99.50
          9 |         50        0.50      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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