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		 No one operates at full capacity 24 hours a day, if you do, your website doesn't matter much as it will be unusable during peak hours. 
 
Based on over a hundred gbps of aggregated adult traffic, you will see roughly 200GB per Mbit of "real world" usage.  Depending on your traffic, this can go up or down - but usually it will stay within the 170GB - 220GB range.   
 
So, 2000GB is a good rough estimate real-world, if your traffic patterns are "average" for the industry. 
 
Hope the info helps! 
 
-Phil 
		
	
		
		
		
		
			
		
		
		
		
	
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