Year Percent of GDP 1980 19.567 1981 19.259 1982 18.797 1983 19.269 1984 19.514 1985 19.778 1986 18.981 1987 19.793 1988 20.07 1989 20.649 1990 20.12 1991 19.034 1992 17.692 1993 17.437 1994 18.318 1995 17.975 1996 18.283 1997 17.948 1998 18.108 1999 15.601 2000 16.21 2001 15.899 2002 15.687 2003 15.629 2004 14.988 2005 15.386 2006 14.693 2007 14.787 2008 12.952 2009 10.936 2010 12.417 2011 13.736 2012 12.104 2013 11.095 2014 12.331 2015 12.307 2016 12.044 2017 13.882 2018 13.336 2019 13.092 2020 13.222 2021 13.454 2022 13.668 2023 13.906 2024 14.151