Year Percent of GDP 1980 4.297 1981 4.297 1982 2.503 1983 4.297 1984 3.664 1985 4.885 1986 4.841 1987 5.653 1988 10.579 1989 11.71 1990 14.489 1991 12.506 1992 11.815 1993 10.823 1994 12.192 1995 15.07 1996 5.887 1997 7.318 1998 11.125 1999 11.733 2000 10.349 2001 9.017 2002 9.778 2003 6.59 2004 6.884 2005 9.865 2006 10.234 2007 10.687 2008 12.728 2009 13.165 2010 14.266 2011 12.182 2012 14.973 2013 8.691 2014 17.481 2015 13.923 2016 13.7 2017 13.832 2018 15.938 2019 16.596 2020 16.827 2021 16.214 2022 16.203 2023 16.638 2024 16.902