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

    ROADWAY |
    SURFACE |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        591        5.91        5.91
          2 |      9,098       90.98       96.89
          3 |          3        0.03       96.92
          4 |         47        0.47       97.39
          5 |        116        1.16       98.55
          8 |         11        0.11       98.66
          9 |        134        1.34      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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