when has growth in the national debt been highest
History of the United States public debt Debt held by the public was $15.05 billion or 16.5% of GDP in 1930. When Franklin D. Roosevelt took office in 1933, the public debt was almost $20 billion, 20% of GDP. Decreased tax revenues and spending on social programs during the Great Depression increased the debt and by 1936, the public debt had increased to $33.7 billion, approximately 40% of GDP.[17] During its first term, the Roosevelt administration ran large annual deficits of between 2 and 5% of GDP. By 1939, the debt held by the public had increased to $39.65 billion or 43% of GDP. The buildup and involvement in World War II during the presidencies of F.D. Roosevelt and Harry S. Truman led to the largest increase in public debt. Public debt rose over 100% of GDP to pay for the mobilization before and during the war. Public debt was $251.43 billion or 112% of GDP at the conclusion of the war in 1945 and was $260 billion in 1950.