question: Name the total number of tourism receipts 2011 where tourism receipts 2003 13.5
answer: SELECT COUNT(tourism_receipts__2011___us) AS $_per_capita_ FROM table_18524_6 WHERE tourism_receipts__2003___as__percentage_of_gdp_ = "13.5"
context: CREATE TABLE table_18524_6 (tourism_receipts__2011___us VARCHAR, tourism_receipts__2003___as__percentage_of_gdp_ VARCHAR)