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

    ROADWAY |
    SURFACE |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        780        7.80        7.80
          2 |      8,930       89.30       97.10
          3 |          1        0.01       97.11
          4 |        102        1.02       98.13
          5 |        128        1.28       99.41
          8 |          5        0.05       99.46
          9 |         54        0.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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