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

    ROADWAY |
    SURFACE |
       TYPE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        639        6.39        6.39
          2 |      9,010       90.10       96.49
          3 |         10        0.10       96.59
          4 |         53        0.53       97.12
          5 |         98        0.98       98.10
          8 |          3        0.03       98.13
          9 |        187        1.87      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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