Although the United States accounts for 30 percent of global GDP, it received two-thirds of the saving exported by countries with current account surpluses in 1999.
The USA makes up one percent of global GDP. 
mnli hypothesis: The USA makes up one percent of global GDP.  premise: Although the United States accounts for 30 percent of global GDP, it received two-thirds of the saving exported by countries with current account surpluses in 1999.