OECD Organization of Economic Cooperation and Development. 8% to 10% of GDP OECD OECD 2.4 per cent 8% to 10% of GDP has fallen 3-4% between FY09 and FY12 Organization of Economic Cooperation and Development. OECD deficits Not so bad, as it happens 8% to 10% of GDP Organization of Economic Cooperation and Development. Organization of Economic Cooperation and Development. 8% to 10% of GDP 2.4 per cent comparison 8% to 10% of GDP comparison