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

    ROADWAY |
    SURFACE |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        931        9.31        9.31
          2 |      8,770       87.70       97.01
          3 |          4        0.04       97.05
          4 |        127        1.27       98.32
          5 |        136        1.36       99.68
          8 |          3        0.03       99.71
          9 |         29        0.29      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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