Answer:
2000 to 2010
Explanation:
Deficit is when the money spent is larger than the money received.
For our graph, the period where orange line is above the blue line.
Looking at the whole graph, around 2006-07 to 2010, the money spent is around 1.5 trillion USD (!) above money received.
So looking at the period 2000 - 2010, the deficit will be the largest in this due to the BIG GAP (deficit) around 2006-07 - 2010 years.
Note: The other periods does have deficit but the amount is not that much.
