Government services account for approximately the same share of national output as manufacturing.

It is national output that makes a country rich, not large amounts of money.

A third way to calculate national output is to focus on income.

Government's annual borrowing will hit 8pc of national output next year.

The county is responsible for approximately 7% of the national industrial output.

As a result, manufacturing may account for little more than 10% of national output and services close to 80%.

Meanwhile, federal spending continues to amount to about 20 percent of national output.

Production peaked in 1844 when it produced 14 million, 1% of the national output.

One study found that protecting the capital alone would cost up to three times the total national economic output.

Since the 1970s, industry's share in national output has remained relatively stable.