Year Percent of GDP 1960-01-01 10.5248362335472 1961-01-01 12.1219631805309 1962-01-01 11.3525352850577 1963-01-01 12.3695979558171 1964-01-01 12.2975187494810 1965-01-01 11.2691726781258 1966-01-01 11.1000596867925 1967-01-01 11.0255653082483 1968-01-01 10.2095670865776 1969-01-01 10.8501862677922 1970-01-01 11.0687341808729 1971-01-01 10.8196145438872 1972-01-01 11.6660048170047 1973-01-01 12.2637056561791 1974-01-01 11.6956180714491 1975-01-01 11.9572704208645 1976-01-01 11.9163040989092 1977-01-01 12.0244220508512 1978-01-01 11.3450378121032 1979-01-01 13.1045551620683 1980-01-01 13.3325330946215 1981-01-01 11.4525104604113 1982-01-01 11.4291900291027 1983-01-01 11.2116924906738 1984-01-01 11.7726101217403 1985-01-01 13.0790204782657 1986-01-01 12.4587607237527 1987-01-01 12.4565792996317 1988-01-01 12.2879592877908 1989-01-01 12.0922517055101 1990-01-01 12.2840137575194 1991-01-01 12.9167719491469 1992-01-01 13.4725300820675 1993-01-01 13.8231416673402 1994-01-01 13.4549317945480 1995-01-01 14.0514878841377 1996-01-01 14.2111110988041 1997-01-01 14.7989937844301 1998-01-01 14.7103145035016 1999-01-01 13.6203090773275 2000-01-01 16.0649233699992 2001-01-01 16.8414502949554 2002-01-01 15.3346466400794 2003-01-01 13.0985954143911 2004-01-01 13.1743845910718 2005-01-01 14.4498423436048 2006-01-01 15.8077134588944 2007-01-01 14.9306758303121 2008-01-01 17.8789827596119 2009-01-01 15.6839056692921 2010-01-01 16.9192694703908 2011-01-01 17.8476405383310 2012-01-01 16.4700892003208 2013-01-01 16.7547686416419 2014-01-01 16.5092605008722 2015-01-01 15.2301517999175 2016-01-01 15.1097364528145 2017-01-01 16.7414745914310