user: Question: What is the GDP % of EU in 2012 of the country with a GDP in billions of USD in 2012 of 256.3?
Columns: ['Member State sorted by GDP', 'GDP in s billion of USD (2012)', 'GDP % of EU (2012)', 'Annual change % of GDP (2012)', 'GDP per capita in PPP US$ (2012)', 'Public Debt % of GDP (2013 Q1)', 'Deficit (-)/ Surplus (+) % of GDP (2012)', 'Inflation % Annual (2012)', 'Unemp. % 2013 M7']
Types: ['text', 'real', 'text', 'text', 'real', 'real', 'text', 'real', 'real']
Sample row: ['European Union', 16584.0, '100.0', '−0.3', 32021.0, 85.9, '−3.9', 2.6, 10.9]
SQL:

assistant: SELECT "GDP % of EU (2012)" FROM "Table" WHERE "GDP in s billion of USD (2012)" = 256.3;