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

    ROADWAY |
    SURFACE |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        826        8.26        8.26
          2 |      8,867       88.67       96.93
          3 |          2        0.02       96.95
          4 |         50        0.50       97.45
          5 |        100        1.00       98.45
          8 |         14        0.14       98.59
          9 |        141        1.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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