<P> Primary balance is defined by the Organisation for Economic Co-operation and Development (OECD) as government net borrowing or net lending, excluding interest payments on consolidated government liabilities . A federal budget that achieves primary balance has federal revenues equaling spending but with a remaining budget deficit as a result of interest payments on past debt . The Center for American Progress recommended on December 14, 2009 that the United States set as a goal achieving primary balance by 2014 . </P> <P> The meaning of "deficit" differs from that of "debt", which is an accumulation of yearly deficits . Deficits occur when a government's expenditures exceed the revenue that it generates . The deficit can be measured with or without including the interest payments on the debt as expenditures . </P> <P> The primary deficit is defined as the difference between current government spending on goods and services and total current revenue from all types of taxes net of transfer payments . The total deficit (which is often called the fiscal deficit or just the' deficit') is the primary deficit plus interest payments on the debt . </P> <P> Therefore, if t (\ displaystyle t) refers to an arbitrary year, G t (\ displaystyle G_ (t)) is government spending and T t (\ displaystyle T_ (t)) is tax revenue for the respective year, then </P>

The total amount of all u.s. government deficits is known as
find me the text answering this question