Name the total number of index weighting % at 17 january 2013 for bouygues
create table table_168274_1 (index_weighting___percentage__at_17_january_2013 varchar, company varchar, PRIMARY KEY (index_weighting___percentage__at_17_january_2013))
select count(index_weighting___percentage__at_17_january_2013) from table_168274_1 where company = "bouygues"