On the expenditure side, household consumption is the main component of Spain's GDP (58 percent), followed by gross fixed capital formation (21 percent) and government expenditure (18 percent). Within investments, tangible fixed assets account for 18 percent of GDP, including construction (10 percent) and machinery, equipment and weapon system (7 percent); and intellectual property products account for the remaining 3 percent. Exports of goods and services account for 34 percent of GDP while imports account for 31 percent, adding 3 percent of total GDP.