Frequencies for first 10,000 rows of vpavetyp variable in vehicle dataset :

    Roadway |
    surface |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |         11        0.11        0.11
          1 |        903        9.03        9.14
          2 |      8,483       84.83       93.97
          3 |          1        0.01       93.98
          4 |         59        0.59       94.57
          5 |         79        0.79       95.36
          7 |          9        0.09       95.45
          8 |        352        3.52       98.97
          9 |        103        1.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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