Net Debt / GDP Ratio = Highest Level Since WWII USA Net Debt / GDP Ratio 120% World War II = ~105% 100% DP G 80% 60% Net Debt / World War I = Civil War = USA ~30% 40% ~30% 20% 0% 1790 1815 1840 1865 1890 1915 1940 1965 1990 2015 Historical Net Debt / GDP Source: Congressional Budget Office Long-Term Outlook (3/18). 283