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

    ROADWAY |
    PROFILE |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      7,537       75.37       75.37
          2 |      2,184       21.84       97.21
          3 |        113        1.13       98.34
          4 |         20        0.20       98.54
          9 |        146        1.46      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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