Name the index weighting % for 17 januaary 2013 for rno
create table table_168274_1 (index_weighting___percentage__at_17_january_2013 varchar, ticker_symbol varchar, PRIMARY KEY (index_weighting___percentage__at_17_january_2013))
select index_weighting___percentage__at_17_january_2013 from table_168274_1 where ticker_symbol = "rno"