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

    Roadway |
    Surface |
       Type |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        759        7.59        7.59
          2 |      8,490       84.90       92.49
          3 |          3        0.03       92.52
          4 |        100        1.00       93.52
          5 |         77        0.77       94.29
          8 |          7        0.07       94.36
          9 |        564        5.64      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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