An economist is analyzing a country's recent economic downturn. They observe the following year-over-year changes in the main components of total spending: a 5% decrease in household purchases of goods and services, a 10% decrease in business investment in new machinery, a 2% increase in government spending, and a 3% decrease in net exports. Based on the typical composition of a nation's total economic output, which of these factors most likely contributed the largest absolute amount to the over