In fiscal year 2016, for the first time since 2009, the federal budget deficit increased in relation to the nation's economic output. The Congressional Budget Office projects that over the next decade, if current laws remained generally unchanged, budget deficits would eventually follow an upward trajectory—the result of strong growth in spending for retirement and health care programs targeted to older people and rising interest payments on the government's debt, accompanied by only modest growth in revenue collections. Those accumulating deficits would drive debt held by the public from its already high level up to its highest percentage of gross domestic product (GDP) since shortly after World War II.