Question: Name the total number for 18-49 share being 18-49 being 3.1
Schema: create table table_20971444_3 (share__18_49_ varchar, rating__18_49_ varchar, PRIMARY KEY (share__18_49_))
SQL: select count(share__18_49_) from table_20971444_3 where rating__18_49_ = "3.1"