The situation where the national debt decrease is when there's a budget surplus.
<h3>What is a budget?</h3>
It should be noted that a budget simply means the document that's illustrates the expenditure and revenue.
In this case, the situation where the national debt decrease is when there's a budget surplus.
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NAFTA was signed on 17th December 1992 by all three members (Mexico, US, Canada) in their respective capitals and it came to power on January 1, 1994.