Question: Name the tourism receipts 2003 for colombia
Schema: create table table_18524_6 (tourism_receipts__2003___as__percentage_of_gdp_ varchar, country varchar, PRIMARY KEY (tourism_receipts__2003___as__percentage_of_gdp_))
SQL: select tourism_receipts__2003___as__percentage_of_gdp_ from table_18524_6 where country = "colombia"