2% of US GDP is 500 billion. I don't know what you're confused about. I'm taking numbers linked from the IMF so perhaps you know better? Also it's obviously not a 2% increase over 45 years, it's a nearly 6% increase, so not sure if numbers are your strong suit here. At least you did admit I was correct though, so I don't know what you're really continuing to try argue about. What I wrote originally stands.