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

 functional |
     system |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,174       11.74       11.74
          2 |        916        9.16       20.90
          3 |      2,814       28.14       49.04
          4 |      1,624       16.24       65.28
          5 |        947        9.47       74.75
          6 |        207        2.07       76.82
          7 |        997        9.97       86.79
         96 |         26        0.26       87.05
         98 |      1,292       12.92       99.97
         99 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 22 Oct 2016