Year Percent of GDP 1980 12.833 1981 13.006 1982 15.465 1983 13.498 1984 18.421 1985 22.555 1986 23.508 1987 22.049 1988 20.969 1989 19.377 1990 19.472 1991 15.563 1992 15.898 1993 14.065 1994 16.095 1995 16.511 1996 15.546 1997 16.608 1998 19.208 1999 16.21 2000 16.162 2001 16.914 2002 14.723 2003 13.78 2004 15.354 2005 14.751 2006 17.076 2007 17.884 2008 16.497 2009 16.612 2010 16.489 2011 14.587 2012 15.348 2013 14.146 2014 14.014 2015 14.965 2016 16.203 2017 15.808 2018 14.324 2019 14.338 2020 14.556 2021 14.914 2022 15.125 2023 15.15 2024 15.177