How many states or District of Columbia have 65.4% overweight or obese adults?
create table table_18958648_1 (state_and_district_of_columbia varchar, overweight__incl_obese__adults varchar, PRIMARY KEY (state_and_district_of_columbia))
select count(state_and_district_of_columbia) from table_18958648_1 where overweight__incl_obese__adults = "65.4%"