Do tariffs go into customs duties?

I was gonna say that in my reply, but I was not sure if thats the case. It could also be excise taxes. But the amount of both is quite small.

More than 1/3 of revenue is not being spent- that's huge! As in the expenditures are only 63.6% of the income, and 35.4% is surplus!

You are right, the graph is crappy. I didn't even pay attention that the surplus is > 1/3 the revenues. I just assumed it was a small percentage by looking at the picture.