Year Percent of GDP 1980 19.501 1981 16.247 1982 17.381 1983 17.421 1984 19.634 1985 21.056 1986 22.908 1987 20.992 1988 21.057 1989 21.323 1990 20.798 1991 19.612 1992 18.94 1993 17.378 1994 18.734 1995 20.686 1996 20.064 1997 23.375 1998 22.506 1999 23.417 2000 24.341 2001 25.471 2002 24.343 2003 24.853 2004 25.736 2005 26.399 2006 27.623 2007 26.725 2008 26.901 2009 22.554 2010 24.639 2011 25.713 2012 25.748 2013 27.45 2014 29.015 2015 28.876 2016 29.36 2017 29.566 2018 28.692 2019 28.513 2020 28.315 2021 28.175 2022 28.13 2023 28.196 2024 28.27