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		 Services are the largest part of the US economy but still not 50%. Services made up 42% of 2008 GDP.  
 
Services 42% 
Non Durable goods 21% 
Government Spending 20% 
Private Investment 14% 
Durable Goods 7% 
 
That's a little more than 100% but then there is a negative for change in inventories and net exports. 
 
I'd say that is a  balanced economy. Not sure what you do better to optimize if anything. 
		
	
		
		
		
		
			
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