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

    ROADWAY |
    SURFACE |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        837        8.37        8.37
          2 |      8,861       88.61       96.98
          3 |          9        0.09       97.07
          4 |        114        1.14       98.21
          5 |        136        1.36       99.57
          8 |          2        0.02       99.59
          9 |         41        0.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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