1 2 % of total federal expenditures from: https://www.theguardian.com/news/datablog/2010/feb/01/nasa-budgets-us-spending-space-travel 1 2 1999–2010 based on federal outlays from: Federal budget (United States)#Total outlays in recent budget submissions ↑ "2011 Budget Overview" (PDF). nasa.gov. ↑ Berger, Brian (2011-04-13).