The national debt is ballooning. Americans are getting more worried about it.

The U.S. national debt crossed $39 trillion last week, and it’s growing fast. Racking up the most recent $5 trillion of that total only took two years, and the last trillion took less than six months.

And Americans are worried. A new survey from the Peter G. Peterson Foundation said fiscal confidence is the lowest it’s been in a couple of years.

The U.S. is currently spending $1 out of every $5 on interest payments for its debt.

“When the government borrows a lot, that increases the borrowing rates for everybody,” said Michael Peterson, CEO of the foundation that published the report.

That increases costs for everybody, he said.

“Every month on their mortgage, on their car loan, on their credit cards,” Peterson said.

More than four out of five respondents to the survey said political candidates’ plans for addressing the debt are important when it comes to deciding who they’ll support.

“(But) when you start asking them, what are you willing to sacrifice to deal with this problem? That’s where things get a little murky,” said Kent Smetters, professor and director of the Penn Wharton Budget Model at the University of Pennsylvania.

He said the debt can be reduced by cutting programs or raising taxes, both of which are notoriously unpopular.

“We know people are open to bigger ideas the worse things get,” Smetters said.

He said to look at Argentina, where voters installed a government that cut the national budget by close to 30%.