According to that terribly reliable source of information that is Wikipedia …
Each year, about 7.8 million tons of coffee is produced, worldwide.
And yet only 5.5 million tons of coffee is consumed.
Hmmm … more thoughts coming soon … once I find more reliable information sources 
Could that be green vs. roasted (the numbers would represent an average 20% weight loss)?
The rest of it is stashed in my cupboard
Heath - not sure - will have to look into in further.
Dan … that wouldn’t surprise me in the slightest