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

    ROADWAY |
    SURFACE |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        799        7.99        7.99
          2 |      8,970       89.70       97.69
          3 |          2        0.02       97.71
          4 |         58        0.58       98.29
          5 |        129        1.29       99.58
          8 |          2        0.02       99.60
          9 |         40        0.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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