With bipartisan congressional talks to end the U.S. government shutdown bogging down on Friday, the hit to the national economy is growing, experts said.

"Even if there is a reopening of the government in the next couple of weeks, you're going to see a visible and permanent loss of economic activity as a result of the government shutdown," Greg Daco, chief economist at consulting firm EY-Parthenon, told CBS News.

Estimates of the economic impact range from $7 billion to $16 billion per week, with the White House's Council of Economic Advisers, a U.S. government agency, forecasting a weekly loss of $15 billion. A recent CBS News poll found that 54% of Americans said they are "very concerned" about how the shutdown is affecting the economy.

Here's where the shutdown, now on Da

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