Table schema:
CREATE TABLE table_1598533_8 (annual_change__percentage_of_gdp__2012_ VARCHAR, gdp__percentage_of_eu__2012_ VARCHAR)

Question: What is the annual change of GDP with a 20.5% GDP of EU in 2012?
SQL: SELECT annual_change__percentage_of_gdp__2012_ FROM table_1598533_8 WHERE gdp__percentage_of_eu__2012_ = "20.5%"